2017 Half Dollar Error List with Pictures
A 1991-D half dollar struck fifty percent off center sold for $546.25 in 2009. That older result helps compare some 2017 half dollar errors, whose estimated values here run from $5 to $600.
Two documented 2017-S examples have interrupted front designs, but one is silver and the other uses ordinary layered metals. Read on to separate those errors from raised cracks, doubled details, missing metal, and shifted strikes.
1. 2017-D Kennedy Half Dollar Die Crack and Chip Error (Estimated Up to $100)
A thin raised line or a small lump can come from damage to the steel tool that stamps a coin. That tool is called a die.
Silver-colored coin metal fills a narrow crack or a small missing piece in the tool. The finished coin then has extra metal standing above its normal surface.
For 2017-D, the report gives a category to check rather than a particular identified example. No fixed route through Kennedy’s portrait or the eagle is established, so start with whether the mark is truly raised rather than assuming a location.
Estimated Value
Estimated value is $5–$100 for genuine minor cracks or small lumps caused by tool damage. Clear marks and good condition support the stronger end.
A larger break on the back of a 1976-D graded NGC MS65 sold for $256 at Heritage in June 2026. MS65 describes an attractive unworn coin.
That more substantial feature belongs in a higher tier. It is a comparison, not a recorded price for a small 2017-D mark.
How to Identify
Read the D mintmark and check the normal copper stripe between the silver-gray edge layers. A scale and calipers should show about 11.34 grams and 30.61 millimeters, with grooves around the edge.
An interior crack or tiny lump should not change those measurements much. Turn the coin under low light and examine the mark and nearby untouched metal with a magnifier.
Check whether a lump shares the surrounding texture or appears to be material stuck on top. A line that rises naturally from the original surface is the immediate distinction from a scratch, which cuts down into already finished metal.
2. 2017-D Kennedy Half Dollar Minor Doubled Die Error (Estimated Up to $150)
An extra raised outline can come from a design repeated in the stamping tool before the coin was made. Collectors call that a doubled die.
The 2017-D report says minor examples have been found, but it does not give a variety number or exact location. It also does not say which side carries the feature.
That makes a close comparison important. A flat shelf beside a letter can result from movement during striking.
Glare can also create a temporary bright outline. Neither effect by itself proves a repeated design in the stamping tool.
Estimated Value
The comparative estimate is $10–$150 for genuine minor doubling on a 2017-D. Clear separation and a reliable match matter more than how much a photograph is enlarged.
A 1974-D doubled die graded ANACS MS64 sold for $49 at Heritage in May 2026. It was unworn but had some marks.
That identified older variety offers a price comparison. Its name, precise letter pattern, and sale history do not transfer to the unnamed 2017 report.
How to Identify
Place a normal 2017-D beside the candidate and compare the same area under similar light. Use a magnifier to look for an additional rounded shape rather than a flat shelf.
Photograph both sides before choosing a close view, since the report does not establish which side to examine. Moving the light can expose an outline that is only glare.
Inspect the edge grooves and copper center stripe. Use a scale and calipers to compare the normal 11.34 grams and 30.61 millimeters.
Matching raised extra shapes on another coin made by the same stamping tool give the most direct confirmation of genuine doubling.
3. 2017-D Kennedy Half Dollar Clipped Planchet Error (Estimated Up to $200)
A curved gap in the edge can start when a blank is cut incorrectly. A blank is the round metal disc used to make a coin.
If the cutting punch overlaps an earlier hole or reaches the end of the metal strip, part of that disc can be missing. The design is then stamped onto the remaining metal.
The 2017-D report lists clips as a possibility to examine, not a certified example. A later cut can also leave a gap, so the edge and nearby design must show that the metal was absent before striking.
Estimated Value
Estimated value is $25–$200 for a genuine identified clip. A small, hard-to-notice gap fits closer to the lower end than a large original missing section.
A 1993-D curved clip graded ANACS MS64 brought $34.74 including buyer’s premium in August 2025. That unworn example supports an affordable comparison.
It is not a 2017 sale. Nor does it establish the size of a clip on a 2017-D candidate.
How to Identify
Examine the missing edge with a magnifier before judging the coin’s condition. Fresh cuts, filing lines, or a rolled burr suggest metal removed after minting.
Follow the edge grooves into the gap and inspect how the nearby design meets it. The rim opposite the gap may be weak, although that clue is not equally clear on every genuine clip.
Calipers can compare intact widths with 30.61 millimeters, while a scale should show a shortfall from 11.34 grams that fits the missing amount.
Original design flowing naturally toward the missing boundary, supported by compatible opposite-rim weakness, gives the quickest useful distinction from a cut coin.
4. 2017-D Kennedy Half Dollar Off-Center Strike Error (Estimated Up to $550)
Part of the design disappears at one edge while untouched metal remains elsewhere. Both sides should show a related shift on a genuine off-center coin.
The round metal disc sat partly outside the intended striking position when the press closed. The tools could only stamp the metal beneath them.
An uneven border around Kennedy alone is not enough to establish this error. The 2017-D report treats off-center striking as a possibility to investigate without identifying a particular dated example, so it does not supply a measured percentage for a known 2017 coin.
Estimated Value
The comparative estimate is $50–$550, from a modest shift to a dramatic example with a readable date. Condition and surviving date detail matter alongside the size of the error.
A 1991-D struck fifty percent off center sold for $546.25 in the 2009 FUN sale. PCGS graded it MS62, meaning no wear but noticeable marks.
That historical result supports the upper comparison. It is not an auction record for a 2017 coin.
How to Identify
Compare photographs of both sides before measuring the shift. If one design remains centered while only the other moves, a shifted stamping tool may explain the uneven border.
A scale reading near 11.34 grams helps show that the metal remains present. Use calipers to record the actual shape against the normal 30.61 millimeters, allowing for spreading during the strike.
With a magnifier, inspect the boundary between stamped and blank metal and check the edge for damage. Its grooves may be incomplete in the unstruck area.
A readable 2017 date and D beside original blank metal, with corresponding missing design on both sides, provide the decisive first check.
5. 2017-S Kennedy Half Dollar Obverse Struck-Through Error (Estimated Up to $600)
Part of the front design was interrupted on two different 2017-S collector coins. GreatCollections listed an enhanced uncirculated example, while Bullion Exchanges described a silver proof.
The enhanced coin uses regular layered metals and a deliberately varied surface finish. The proof is a specially made silver collector coin with reflective and frosted areas.
Both reports describe material blocking contact during striking, called a strike-through. Neither identifies what that material was.
Do not automatically name grease, wire, or cloth as the cause. The normal contrast in the coin’s special finish is also separate from the error.
Estimated Value
Estimated value is $75–$600 for these collector-finish strike-throughs. Both listed coins received grade 69, meaning nearly flawless condition.
The 2017 listings identify the coins but show no visible realized sale price. A regular-metal 1976-D with strike-through effects on both sides sold for $114 in March 2025.
That different-finish coin is only a broad comparison. The silver proof and enhanced-finish example each need separate assessment within the estimated range.
How to Identify
Identify the finish and metal before inspecting the mark. A scale should show 11.34 grams for the enhanced layered coin or 12.50 grams for the 90%-silver proof.
Calipers should show about 30.61 millimeters, and both have edge grooves. A visible copper center stripe supports the layered-metal identity.
The enhanced example and silver-proof example provide separate photographs for comparison. Use a magnifier to compare the interrupted design with normal finish changes on an undamaged coin.
An exact match to the error boundary on the correct identified example gives the shortest confirmation, rather than treating every change in brightness as missing detail.
Conclusion
The estimated $5–$600 range covers small raised marks through clearly visible collector-coin strike-throughs. Start with what changed: extra metal, repeated detail, a missing piece, or a design that did not reach part of the disc.
Keep the two 2017-S finishes and their weights separate. Their reported strike-throughs have identifiable examples, while the broader candidate categories still need the physical checks described here before their estimated prices can be applied.