1999 Quarter Error List with Pictures

The first five state designs make 1999 quarter errors a varied search: horses, a peach, a tree, a boat, and Pennsylvania’s statue. Some clues need magnification; others change the entire piece of metal.

A golden experimental Georgia quarter brought $7,200 in January 2020. Estimated values below range from $2 to $15,000, depending on the error and condition.

Use the pictures and checks to distinguish small doubled details from missing layers, repeated strikes, and coins made on unexpected metal.

1. 1999 State Quarter Clashed Connecticut Design

Extra lines among Connecticut’s tree branches were once listed as several doubled-die varieties. The specialist catalog later withdrew those identifications and called the features die clashes.

A clash happens when the two steel stamping tools hit each other without a blank between them. Their altered surfaces can then transfer parts of the opposite design onto later coins.

The affected Philadelphia quarters therefore need a comparison with Washington’s side. An unfamiliar branch-like line alone is not enough.

The old doubled-die names do not make these separate valuable varieties.

Estimated Value

A recognizable Connecticut clash has an estimated value of $10 to $150. Small traces with limited visibility sit near the lower end.

A clear transferred shape can bring more interest when the rest of the coin remains sharp. Wear and scratches can make faint lines much harder to follow.

Do not pay a doubled-die premium for a withdrawn identification; the visible clash itself is the feature being valued on these Philadelphia examples.

How to Identify

Take a normal Connecticut quarter and study the tree’s natural branch pattern first. Many thin lines belong to the intended design.

On the suspected error, mark the extra lines in a photograph and compare them with Washington’s side. Their shapes should make sense as traces from the opposing tool rather than repeated tree branches.

Use lighting from several directions to check that the marks remain fixed in the metal. Random scratches can look convincing in one bright photograph.

The Connecticut variety catalog corrects the older doubled-die listings to clashes. Match the actual extra shape, rather than using an old catalog number as proof of a doubled design.

 

2. 1999 State Quarter Extremely Weak Strike

The horse and portrait can appear unusually faint even when a coin has not worn down in circulation. A very weak strike may fail to fill the stamping tools’ recessed details.

A Delaware example is reported with an ANACS error description. Its mint letter has not been established in the year report.

Collectors may call this a die-adjustment strike, but that name does not prove someone deliberately made a test coin. The visible feature is the shallow transfer of design.

A worn or polished quarter needs a different explanation.

Estimated Value

For an identified extreme weak strike, use an estimated $25 to $300 range. Strong enough surviving detail to recognize Delaware and the year helps make the coin collectible.

A barely visible design on an otherwise original surface can be more interesting than a simply worn portrait. Scraping or chemical erosion lowers that appeal and may explain the weakness entirely.

The estimate concerns the striking error, not a premium for an assumed experimental purpose.

How to Identify

Compare high and low parts of the portrait instead of judging only the horse. Ordinary wear usually flattens the most exposed details before protected areas disappear.

A weak strike can leave shallow design across larger parts of both faces. Check whether the remaining surface texture continues naturally through those areas.

Look closely for polishing lines, corrosion, or a bright smoothed patch. Later removal of metal can erase detail without any weakness in the original strike.

Keep the full state side visible when photographing the coin. The 1999 date is the minting year; Delaware’s 1787 belongs to the state design and cannot date an otherwise unidentified weak quarter.

 

3. 1999 State Quarter Struck-Through Grease or Other Material

Material caught between the blank and a stamping tool can leave an empty impression or prevent details from forming. Philadelphia New Jersey examples include a grease-related coin and another affected on both faces.

The grease example also has later scratches. Those scratches are condition damage, not part of the striking error.

The two-face example does not identify the trapped material as grease. A depression can record a different obstruction.

Both faces therefore need their own comparison with normal design, even when the overall effect looks similar.

Estimated Value

Minor grease weakness can fit an estimated $10 to $50 range. Larger original impressions or obvious two-face effects can reach an estimated $50 to $300.

The scratched New Jersey example needs a condition discount compared with an equally clear error on an untouched coin. Missing detail alone does not erase that damage.

For the two-face coin, value the complete piece once rather than adding a full price for each affected side.

How to Identify

Separate weak original detail from later scratches before naming the feature. Scratches cut across the surface and may leave pushed metal beside their paths.

A blocked area can fade or interrupt the intended design while neighboring features remain stronger. Compare the boat scene with a normal New Jersey quarter under the same lighting.

For a two-face example, map the affected area on each face in separate photographs. The material responsible for one depression cannot be identified simply because another coin was described as grease-filled.

Leave any residue or trapped material in place. Cleaning may remove useful evidence, while a clear photograph of the boundary can help show how the design meets the affected surface.

 

4. 1999 State Quarter Partial Collar Strikes

The edge can form a step when part of a coin sits outside the collar during striking. That ring normally controls the diameter and creates the grooves around a quarter.

Examples include Denver Pennsylvania, both mints of New Jersey and Georgia, and Philadelphia Connecticut. The Pennsylvania report describes a tilted partial-collar effect.

A tilted position can change the height of the stepped band around the edge. It differs from rotating one face relative to the other.

The side view carries the main evidence, even when the faces appear fairly normal.

Estimated Value

An estimated $15 to $300 range suits simple partial-collar errors among these issues. Slight steps sit near the low end, while stronger changes around an otherwise attractive edge can bring more.

A coin combining a collar error with a clip or mirror impression needs a whole-coin comparison for that combination. This simple-error range should not be added to another full estimate.

Bent rims and filed edges do not receive the same premium.

How to Identify

Use an edge photograph wide enough to show both the grooved and expanded portions. A single front-facing image may conceal the step entirely.

Rotate a loose coin slowly and note whether the band stays level or changes height. Changing height can support the reported tilted-collar appearance on Pennsylvania.

Inspect the boundary for cuts or scrape marks. A later groove can look like a collar step until the worked surface is examined closely.

Keep the state and mint letter with each edge image, since the listed states have different examples. A rotation of the back design requires a separate face-alignment test and cannot be diagnosed from this stepped edge.

 

5. 1999 State Quarter Broadstrikes

A broad border can form when the collar fails to contain the coin during the strike. Metal spreads beyond its usual outline while the main designs remain on the blank.

New Jersey and Georgia examples are recorded from both Philadelphia and Denver. Philadelphia Connecticut examples are also listed.

Some broadstrikes sit unevenly within the expanded metal. That does not automatically turn them into off-center strikes.

The useful distinction is whether the main design fits, rather than whether every part of the border has equal width in a photograph.

Estimated Value

Comparable simple broadstrikes have an estimated range of $25 to $500. A modestly widened coin belongs near the lower end.

More striking expansion with clear state detail can attract stronger bids, especially when the surface remains clean. A severely flattened or scraped coin has a different appearance and usually less appeal.

For examples that also carry mirror impressions or several strikes, use the complete combination’s value rather than adding this price as a separate premium.

How to Identify

Check the available metal against the design before judging the size of the border. The main portrait and state scene should remain within the coin.

Measure a loose example across more than one direction; a normal quarter is about 24.3 millimeters wide. An expanded outline should agree with what the border and edge show.

An off-center strike instead leaves an unstruck region opposite design that runs beyond the blank. Follow that relationship on both faces before choosing between the two errors.

Finally examine the letter tops and surfaces for flattening from later pressure. Expansion caused by crushing a finished quarter does not create a genuine broadstrike.

 

6. 1999 State Quarter Spitting Horse, Cracks, and Cuds

A raised line extending from Delaware’s horse mouth gives the “Spitting Horse” its nickname. It is reported as a cracked-tool feature, not material coming from the horse.

Georgia has cataloged rim-connected breaks from both mints, along with developing and partly retained breaks. Connecticut also has a developing break near the front rim.

A retained break means damaged tool metal remained in place rather than falling away completely. Its coins can keep some detail within the affected patch.

These stages belong to damaged stamping tools rather than separate animal-themed designs.

Estimated Value

Small lines or chips have an estimated range of $2 to $50. Large, recognizable rim-connected breaks can reach an estimated $50 to $500.

A horse-mouth nickname can make a modest feature easier to market, but does not automatically make it rare. The line’s clarity and the coin’s preservation still matter.

For Georgia’s developing or retained breaks, compare the actual stage shown; a fine early line should not inherit a price for a much larger later patch.

How to Identify

Start with the Delaware horse’s mouth and follow the extra raised line into the open space to its left. Look for a ridge above the surface rather than a groove cut into it.

For Georgia or Connecticut, move to the reported rim area and trace the boundary of the damaged-tool feature. A complete cud joins the edge and replaces normal design with a raised patch.

A retained or developing break may still carry design inside its boundary. Compare that detail instead of assuming every outlined patch is a missing piece of tool.

Changing the light helps reveal relief, while nearby dents or scrape marks may explain extra-looking metal caused after minting.

 

7. 1999 State Quarter Doubled Dies

A small extra outline under Washington’s ear appears on several 1999 state varieties. The repeated detail was built into the stamping tool before the coin was struck.

Delaware also has doubled saddlebag edges, and one Philadelphia Georgia coin combines ear doubling with repeated peach-leaf detail. These are not extra blows to the coin.

A separate San Francisco Pennsylvania clad Proof has much stronger front lettering doubling. Proofs are specially prepared collector coins.

The ordinary ear varieties and that Proof need different comparisons, even though both involve doubled dies.

Estimated Value

Minor ordinary doubled-die features have an estimated range of $5 to $150. Bold, well-matched examples bring more interest than slight thickening on worn coins.

The stronger Pennsylvania clad Proof fits a separate estimated $100 to $1,000 range, including the complete collector coin. Its strong lettering should not set the price of a tiny ear outline.

A New Jersey Proof ear variety also needs its own finish comparison, since its catalog does not specify silver or clad metal.

How to Identify

Locate the lower edge of Washington’s ear under magnification. Ordinary reports cover P and D Delaware, Pennsylvania, and Georgia; P New Jersey; and D Connecticut.

A New Jersey S Proof ear example is separate. Do not choose its metal composition from the doubled feature alone.

On Delaware’s back, inspect below the saddlebag; on the paired Georgia example, inspect the upper peach-leaf edge. The two features on that Georgia coin do not represent two different specimens.

Pennsylvania’s S clad Proof needs a wider front view. Compare the strongly repeated left-side lettering, with weaker repetition in the motto and S.

Flat shelves from strike movement lack the rounded repeated relief needed for these comparisons.

 

8. 1999 State Quarter Rotated Designs

The back design should appear upright after a U.S. quarter is flipped from top to bottom. A rotated stamping tool can leave that design leaning or upside down instead.

Delaware examples occur from both mints, while Denver Georgia and Connecticut are also reported. Different angles belong to different coins.

One Philadelphia Delaware example was corrected from a labeled half-turn to about 170 degrees. Other reported Delaware rotations reach a true half-turn.

The normal opposite orientation of two U.S. coin faces is not itself an error.

Estimated Value

For a genuine noticeable rotation, use an estimated $25 to $1,000 range. Small deviations tend to attract less interest than large, easily demonstrated turns.

A near-half-turn example can make a particularly clear display, but wear and surface damage still affect price. State and mint also matter when comparing available coins.

Use the measured deviation from normal alignment, rather than subtracting an unexplained angle from 180 degrees or relying only on a holder’s rounded description.

How to Identify

Hold Washington upright and keep the coin from turning within your grip. Flip it from top to bottom, like turning a calendar page upward, then check the state design.

Use a normal quarter first to practice the movement. Its back should finish upright when the flip is performed correctly.

Photograph the two positions without rotating the coin to straighten the back. Measure how far the state design departs from upright, including whether it leans clockwise or counterclockwise.

Published Georgia descriptions include different angles, so do not assign one number to every specimen. For the corrected Philadelphia Delaware example, preserve the measured 170-degree description rather than forcing it into a perfect half-turn.

 

9. 1999 State Quarter Clipped and Incomplete Blanks

Missing metal can leave a curved bite, a straight boundary, an outside corner, or an oval outline. Several 1999 examples combine these shapes with displaced or expanded strikes.

Delaware and New Jersey have multiple clips; Pennsylvania includes corner and curved losses. Georgia has double clips and oval examples, while Connecticut includes straight-loss and bow-tie shapes.

Some very incomplete Delaware, Pennsylvania, and Connecticut pieces retain only small parts of the design. Each shape needs its own explanation.

A broad border or off-center image can belong to the same incomplete blank.

Estimated Value

Estimated values range from $25 to $1,500 across modest clips and more dramatic incomplete shapes. A small curved bite is generally less striking than an unusual corner or large oval outline.

Readable state details and clean surfaces help buyers identify what remains. An additional off-center or collar effect can add interest, but the coin still receives one whole-piece estimate.

Later cutting is a different matter and does not qualify simply because the final shape looks unusual.

How to Identify

Follow the missing boundary from both faces and through the edge. A curved gap, straight strip edge, and corner junction preserve different clues about the original blank.

Oval pieces need a full-outline photograph rather than a close crop of one end. Check for file marks or sharp burrs that could reveal later cutting.

For Connecticut’s clipped-and-off-center examples, separate the missing-metal boundary from the unstruck area. One records an incomplete blank; the other shows where the tools missed it.

Weigh a loose piece only when it can be handled safely. Compare the loss with the shape instead of assigning a clip percentage from weight alone or copying another state’s measurement.

 

10. 1999 State Quarter Off-Center Strikes

A quarter blank that sits out of position can receive only part of the intended design. The unused metal forms a blank crescent beside the struck area.

Recorded examples cover all five states, with both small shifts and severe displacements. A Denver New Jersey example is described as about half off center.

Georgia includes modest Philadelphia examples and a much larger eighty-five-percent shift with no established mint. Those are separate coins.

The missing image is caused by placement during the strike, not by cutting away an already completed coin.

Estimated Value

An estimated $25 to $2,000 covers simple off-center pieces of varying size and condition. Historical dealer asks included $135 for a fifteen-percent Philadelphia Georgia and $250 for a twenty-percent example.

The larger displacement did not make every later coin automatically more valuable. Readable date, state design, and surfaces also affect demand.

A severely shifted piece can still be identified by its state design even when the 1999 date falls outside the metal.

How to Identify

Find the blank crescent and trace its boundary around the struck design. Opposite it, some intended lettering or scenery should run beyond the available metal.

Check the other face for the matching displacement. If only one design shifts while the other stays centered, a misplaced stamping tool may be responsible.

For very large shifts, use the surviving horse, tree, boat, peach, or statue to establish the state. Do not invent a mint letter that lies outside the struck area.

A cut edge may imitate missing design, but it does not create the same smooth unstruck region. Photograph the whole outline to show both effects together, especially on the severe Georgia and New Jersey examples.

 

11. 1999 State Quarter Missing Whole or Partial Clad Layers

A pale outer layer can be absent from a quarter, leaving copper-colored design on the exposed center. Delaware examples show missing back layers, while Georgia has front-layer and partial-loss examples.

Connecticut records include both front and tree-side losses. The copper-colored tree sometimes receives the nickname “Burning Bush.”

That name does not create a separate variety. It describes the missing-layer appearance.

One Denver Georgia example weighs 4.62 grams, but partial losses can have different weights depending on how much metal remained and when the separation occurred.

Estimated Value

Use an estimated $150 to $2,000 range for genuine partial or complete layer-loss examples. Historical dealer asks included $250 for a Philadelphia Connecticut front loss and $575 for a Denver tree-side loss.

A Philadelphia Delaware back-layer example was offered at $1,650. These were different coins and asking prices, not one shared market result.

The affected face, color, original design, and condition help explain why complete-coin prices can vary so widely.

How to Identify

Compare the two faces first and record which area is copper-colored. Then inspect the edge for the remaining layered structure rather than relying on a nickname.

For a loose clad coin, compare the measured weight with the normal 5.67 grams. A full lost layer can produce a substantial drop, while a partial loss needs its own assessment.

Do not require every piece to be exactly twenty percent light. A small missing area or a different stage of separation can change the result.

Check for scraped surfaces, residue, and chemical damage that might imitate exposed copper. Keep silver Proofs separate: their normal 6.25-gram composition lacks the copper-core stripe of an ordinary clad quarter.

 

12. 1999 State Quarter Separated Clad Shell

A thin shell can survive after a quarter’s outer layer separates from the rest of the coin. The documented Pennsylvania example is the back layer itself.

It is not a complete quarter whose back layer is missing. Those two objects are complementary possibilities, but they should not be confused.

The shell retains the state-side image on a much thinner piece of metal. Its inner surface can help reveal the separation.

NGC illustrated the Pennsylvania layer with an MS64 grade, an unworn condition with some visible marks.

Estimated Value

For an authenticated separated layer of this kind, estimate $100 to $2,000. Clear state detail and an intact outline can make a delicate shell easier to recognize and display.

A fragment that has been bent, cleaned, or torn may bring less. The estimate concerns the thin layer alone unless its matching remainder is actually present.

Do not use a complete missing-layer quarter’s weight or price as though it described this separate object.

How to Identify

Look at the edge before interpreting the color. A separated shell should be far thinner than a normal quarter and should not contain the entire layered blank.

Photograph the state side and the exposed inner surface without flattening the piece. Design on one surface and a separation texture on the other help explain what survived.

Keep a certified example in its holder. If a loose shell can be weighed without bending it, record that measurement alongside its thickness rather than testing it by flexing.

An etched or ground-down coin may also become thin, so inspect for tool marks and unnatural surface removal. The intact separation boundary deserves particular attention from an error specialist.

 

13. 1999 State Quarter Off-Center Strike with a Large Indent

A large smooth depression can form when another blank blocks part of a coin during striking. The obstructing blank leaves its shape without necessarily leaving a design.

NGC illustrated a New Jersey example struck about fifteen percent off center with a roughly half-face front indent. Both features belong to one coin.

The empty depressed area is not automatically a mirror impression. A mirror impression requires transferred design, not merely a broad blank patch.

The off-center border and the indent therefore need to be read as two parts of one striking event.

Estimated Value

A comparable authenticated combination has an estimated value of $200 to $2,000. A clear, broad indent beside readable state details can make a striking display.

The off-center effect may add interest, but its value should not be added as a second whole-coin price. Surface damage and the clarity of the depression affect the final comparison.

A dent made after minting does not earn the same premium simply because it covers a large area.

How to Identify

Map the off-center strike first by tracing the unused blank crescent and the design that runs off the opposite edge. Then examine the separate depressed area on the front.

The indent should interrupt the struck design in a way consistent with another blank blocking the tool. Search its surface for a transferred picture before deciding whether a mirror impression is also present.

A plain depressed patch and a sunken backward image are different findings. Later impacts may instead leave crushed details or pushed metal around the depression.

Use full-face and low-angle photographs together. The boundary between the indent, surviving portrait, and off-center area is more informative than a close-up of the depression alone.

 

14. 1999 State Quarter Struck through a Die Cap

A coin stuck to a stamping tool can block the next blank entering the press. The new coin receives a weakened or distorted image through that metal cover.

A Philadelphia Connecticut example combines this front-side effect with a partial-collar strike. The edge therefore shows a separate step related to how it sat in the surrounding ring.

This quarter is the coin struck beneath the cover. It is not the cup-shaped coin that formed the cover itself.

The distinction explains why a cap-related error can remain relatively flat.

Estimated Value

For a clear Connecticut covered-tool strike with a collar effect, estimate $200 to $2,000. Strong evidence of the blocked image matters more than a generally weak portrait.

An obvious stepped edge can make the combination easier to demonstrate. Condition and the amount of surviving tree-side detail also affect appeal.

The estimate covers the whole coin, including its collar effect, rather than adding a separate price for each feature or borrowing the value of a tall die cap.

How to Identify

Compare the front and back designs to see how the obstruction affected the strike. A cap over one tool can weaken that side while the other side remains more directly impressed.

Look for distortion or broad loss of portrait detail rather than a few worn high points. Ordinary wear or a small grease-filled area needs a different comparison.

Now inspect the edge for the cataloged partial-collar step. That feature helps describe the same coin but does not prove the covered-tool effect by itself.

Keep photographs of the portrait, tree, and edge together. A tall cup-shaped piece belongs to the cap itself, whereas this example received its image through the intervening metal.

 

15. 1999 State Quarter Double and Multiple Strikes

Repeated blows can leave several portraits or state designs on one quarter. Examples include Delaware, New Jersey, Pennsylvania, Georgia, Connecticut, and one Philadelphia piece whose state remains unidentified.

Some strikes overlap closely; others land far off center. A Denver Pennsylvania coin is cataloged with at least twenty-six blows in two overlapping groups.

Triple and quadruple examples occur separately, while a Georgia report describes eight strikes. New Jersey also has a second strike with a partly blocked back.

Those counts describe individual specimens rather than prices or separate error types.

Estimated Value

An estimated $200 to $4,000 covers these repeated-strike combinations. A historical dealer asked $2,850 for the Denver Pennsylvania coin with at least twenty-six strikes.

That asking price is a comparison, not proof that more blows always bring more money. Two widely separated, readable images can be more appealing than many cramped overlapping lines.

Condition, intact metal, and the ability to trace each major impression help determine the value of the whole coin.

How to Identify

Choose one clear portrait or state image and mark its outline on a photograph. Then follow displaced features that belong to another strike rather than counting every bright edge.

For New Jersey’s blocked-back example, note which second-strike areas actually carry design and which remain flat. A missing image should not be invented to complete the count.

The Denver Pennsylvania piece has two dense strike groups, so a quick visual count may fall short of its cataloged total. Connecticut and Georgia examples require their own image maps.

Compare both faces to see whether the apparent extra designs fit the coin’s movement. A small rounded doubled letter from one tool does not explain a separate displaced portrait.

 

16. 1999 State Quarter Two-Coin Mated Pair

Two coins struck in contact can preserve matching evidence of the same press event. Collectors call them a mated pair when the impressions fit together.

A Philadelphia Georgia pair was sold with collar, indent, and stretched-strike effects. One coin helps explain the shape left on the other.

The pieces were offered as an uncertified pair in the historical auction. They should not be described as coins permanently bonded together.

Keeping the two pieces associated preserves the relationship that makes this combination more informative than either coin viewed alone.

Estimated Value

The Georgia pair brought $2,415 in the 2001 ANA auction, according to the published results. That figure is for both coins together.

A practical estimated range is $1,500 to $5,000 for a comparable matching pair. Clear contact relationships and original surfaces support stronger interest.

The pair’s combined appearance matters more than adding two separate error estimates. Damage or the loss of one matching coin can reduce both its explanatory value and collector appeal.

How to Identify

Begin with photographs of both coins, keeping the state designs upright and showing every major depression or expanded area. Mark the places where one coin appears to explain the shape left on the other.

Compare those boundaries on screen instead of forcing the pieces together, which could damage the matching surfaces. Two coins with similar errors are not enough; the contact shapes must fit one shared striking event.

Study the smaller details inside the matching areas, since their positions can strengthen or weaken the proposed relationship. Store the coins separately within the same labeled set so they cannot rub, while preserving their connection as a pair.

 

17. 1999 State Quarter Die Caps and Cap Combinations

A coin can stick to a stamping tool and wrap around it as more blanks are struck. Its walls rise into a cup, forming a die cap.

Philadelphia Delaware and Connecticut examples are recorded, along with Georgia pieces whose mint letter is not always readable. A Philadelphia Georgia example combines a deep cap with a double strike.

Another Georgia piece began with a sunken mirror impression, then remained on a tool and expanded further. Its mirror image belongs to that same cap.

These are the covering coins themselves, not flat coins struck beneath them.

Estimated Value

Estimated values range from $500 to $6,000 for genuine caps and these related combinations. A Georgia price history reports $4,200 on August 28, 2022 for a deep double-struck example.

The height and completeness of the walls strongly affect visual appeal. Clear state detail helps identify a cap whose stretched surface may hide its mint letter.

Do not add separate full values for the cup, second strike, and mirror impression when they occur on one piece.

How to Identify

Do not press on a cap’s wall to test its strength. A thin stretched edge can bend and lose the shape that explains the error.

Use side photographs to follow the wall around the coin. A complete cup differs from one rim segment bent upward by a later impact.

Now trace the design from the floor toward the rising sides. Repeated pressure can spread details unevenly or make them fade as the metal stretches.

The mirror-impressed Georgia cap also needs a close view of its sunken backward peach. Keep that transferred image connected to the same cup-shaped piece.

If stretching hides the mint letter, retain the known state identification without borrowing a mint from another cap.

 

18. 1999 State Quarter Brockage Mirror Impressions

A finished coin can act as a stamp when it stays between a blank and a striking tool. Its raised design leaves a sunken, backward copy on the new coin.

That mirror impression is called brockage. Connecticut reports include a tree image where Washington’s portrait should appear.

Philadelphia New Jersey examples combine mirror impressions with expansion or a partial-collar edge. One expanded example was struck on a blank whose edge had not yet been raised.

A smooth blank area is different: without transferred design, it is not enough to establish brockage.

Estimated Value

A genuine partial or larger mirror impression has an estimated value of $200 to $6,000, depending on its clarity and combination. Readable backward lettering often gives buyers an immediate way to understand it.

An expanded New Jersey example with strong mirror detail can be more dramatic than a small fragment. Original surfaces remain important even when the error itself is obvious.

The complete coin receives one value, including any accompanying broadstrike or partial-collar effect.

How to Identify

Look for backward lettering or a recognizable reversed tree or boat before using the brockage name. Those features should be sunken into the surface, unlike the normal raised design.

Check the other face to establish the state and the ordinary image. On Connecticut, the unexpected tree impression occupies the face normally reserved for Washington.

New Jersey’s expanded example needs an edge view as well as the mirror close-up. Its unprepared blank and spreading are parts of the same specimen.

A later coin pressed into another can imitate mirror detail, often with crushed surrounding features. Have a major candidate examined intact rather than trying to recreate the impression with another coin.

 

19. 1999 State Quarter Nickel and Foreign Blanks

The quarter design can be too large for the blank carrying it. Documented nickel-blank examples include Denver Delaware, Philadelphia New Jersey, and Philadelphia Connecticut.

Philadelphia Georgia also has a nickel-blank coin with a mirror impression. The unusual metal and the transferred image belong to one combination.

A separate Denver Georgia coin is described as struck on a foreign blank. Its foreign denomination has not been established in the available report.

Neither a small diameter nor a missing mint letter justifies assigning an exact foreign country or copying another specimen’s identity.

Estimated Value

Nickel-blank errors fit an estimated $500 to $3,000 range, with a strong mirror combination potentially reaching about $5,000. Each coin needs its own condition comparison.

The separate Denver Georgia foreign-blank report lists a $4,080 April 2021 sale. A practical estimated range for that rarer category is $2,000 to $7,000.

That result does not establish a foreign denomination or set the value of the smaller domestic nickel-blank examples.

How to Identify

Record the weight and diameter of a loose candidate before deciding what blank it used. A nickel blank normally weighs 5 grams, compared with a clad quarter’s 5.67 grams.

Inspect the edge for uniform nickel-alloy metal rather than the quarter’s copper-centered layers. Check whether the outer design was cut off simply because the smaller blank could not receive it.

Georgia’s combined example also needs a sunken mirror image, so metal measurements alone do not fully identify that coin. Keep its two effects together in photographs.

For the foreign-blank report, material analysis and an expert examination are needed before naming a country. Do not infer one from color or size alone.

 

20. 1999 State Quarter Struck on Feeder-Finger Fragments

A broken part of the feeding mechanism can enter the striking area instead of a coin blank. The press may then stamp designs onto that irregular piece of machinery.

Delaware and Connecticut examples are recorded on feeder-finger fragments. Some received two, three, or more strikes.

The Delaware auction example shows repeated Washington portraits and horses, with another partial motto confirming an additional blow. Connecticut reports include light aluminum fragments.

A machine fragment differs from clipped coin stock, even when both have jagged outlines and incomplete designs.

Estimated Value

The Delaware fragment brought $1,057.50 on August 12, 2016 at Heritage. A historical dealer list asked $3,250 for a separate Philadelphia Connecticut fragment.

An estimated $700 to $7,000 range covers comparable authenticated pieces with different size, metal, and surviving designs. The asking price and auction result are separate comparisons.

Clear impressions and a credible identification of the machinery metal help support value beyond an irregular scrap shape alone.

How to Identify

Begin with the object’s outline and material, not the number of visible portraits. A feeder fragment does not have the round layered structure expected of a quarter blank.

Photograph both surfaces and every broken edge without bending or scraping them. Repeated state designs can help show how the fragment moved through the press.

On the Delaware example, separate the two horses and portrait positions from the additional motto fragment. Connecticut pieces need their own tree and lettering comparisons.

Professional material examination is important because ordinary metal scrap can also carry an incomplete design. The identity should explain both the unusual object and its genuine struck images, rather than relying on an old label alone.

 

21. 1999 State Quarter Reported Bonded Coins

Two pieces of metal can remain joined after heavy striking pressure. Collectors call the result a bonded error when the connection formed as part of the minting event.

A 1999 year list includes this category, but does not establish a state or a specific verified pair. Its wording also overlaps with ordinary mated-pair descriptions.

The distinction matters: two coins with matching impressions can remain separate. A bonded pair must have a real connection.

The reported category therefore requires proof of that connection before it receives a bonded-error price.

Estimated Value

For a genuine authenticated 1999 bonded pair, an estimated $2,000 to $10,000 reflects the potential rarity and striking appearance. This is a conditional estimate, not a reported sale of the unidentified candidate.

Readable outer designs and an original, undisturbed joint are important to collectors. Glue, solder, or a later forced attachment does not qualify.

Value the joined object as a whole rather than pricing each visible face as a separate complete error coin.

How to Identify

Keep the pieces in their existing position and do not test the joint by pulling. Breaking a genuine connection would destroy part of the evidence.

Photograph the meeting edge under magnification, including any squeezed metal and the nearby struck detail. Also record both outer faces so the date and state can be identified where visible.

Look for signs of glue, solder, or later mechanical attachment without scraping the surface. A matching depression alone establishes neither a bond nor its timing.

A specialist should examine whether the connection formed under striking pressure. If the coins are separate but their impressions match, assess them as a mated pair rather than claiming a bonded piece.

 

22. 1999 State Quarter Experimental Alloy Blanks

Some Philadelphia quarters were struck on unusual alloys during development of the golden dollar. Certified examples cover Delaware, Pennsylvania, New Jersey, Georgia, and Connecticut.

Their metals can contain copper and zinc with manganese and nickel. Some examples retain a copper core, while their colors and other properties can differ.

These are not ordinary silver Proofs, and a golden surface alone cannot identify one. The experiments did not give every state the same appearance.

The Georgia coin sold in 2020 had a consistent lemon-gold color and a sharply formed design.

Estimated Value

The Georgia experimental quarter brought $7,200 on January 10, 2020. Its PCGS MS67 grade indicates a very well-preserved unworn coin.

An estimated $3,000 to $15,000 range covers authenticated experimental examples across the different states and compositions. The strongest price comparison needs the correct alloy, state, and condition.

A plated souvenir or stained circulation quarter does not enter that range merely because its surface looks golden.

How to Identify

Treat color as a reason to investigate, not as the final test. Ordinary quarters can become yellow or coppery through plating, staining, or other later treatment.

Record a loose candidate’s weight and thickness without scratching its surface. The 2020 Georgia auction coin weighed 105 grains, about 6.80 grams; that is one specimen’s measurement, not a rule for all five states.

Inspect the edge layers and compare them with the certified example being considered. An experimental piece may retain a copper core, so its presence does not automatically settle the question.

Professional alloy testing and a recognized error attribution are needed to connect unusual metal with the documented experiments. Keep the coin’s original surface intact for that examination.

 

Conclusion

A nickname is only a starting point with 1999 quarters. Trace the raised line, missing metal, or repeated image that actually explains the coin.

Estimated values span $2 to $15,000, with experimental alloys and major combinations far above most small defects. Keep state, mint, and finish together when comparing prices.

Protect fragile fragments and attached metal, and photograph both faces before handling an unusual edge or paired set.