Rare 1991 Half Dollar Errors (List & Pictures)
A doubled picture and a shifted picture describe different striking accidents. In the published 2009 FUN results, a 1991-P double strike brought $1,092.50, while a 50% off-center 1991-D brought $546.25.
These 1991 half dollar errors have estimated values of $20–$1,200. Begin with the full outline and overlapping designs, inspect the smaller front and edge flaws, then check the reverse initials.
| Clue | Inspection area | Error | Estimated value |
|---|---|---|---|
| Two separately positioned pictures | Both faces | Double strike | $300–$1,200 |
| Large blank section with missing design | Full outline | Off-center strike | $150–$650 dramatic; $20–$100 smaller |
| Complete design on a widened coin | Diameter and edge | Broadstrike | $50–$300 |
| A shallow missing edge section | Rim of the D coin | Rim clip | $20–$75 |
| An interrupted front design | Reported D-mint strike-through area | Strike-through | $50–$200 |
| Both tiny designer letters absent | Beside eagle’s leg and tail | Missing FG check | $20–$150 comparative |
Regular Kennedy halves weigh 11.34 grams and measure about 30.61 mm, with edge grooves. Weight and measurements can help assess altered outlines, but they do not identify a specific error by themselves.
1. 1991 Half Dollar Two Complete Impressions Overlap: Double Strike Error
The illustrated 1991-P received a second blow after the first design had already formed. Parts of the two independently positioned pictures remain visible together.
ANACS graded the coin MS64 PL: unworn with some marks and a prooflike appearance. PL describes reflectivity, not special proof manufacture.
How to Identify
Find a recognizable part of one image that continues beneath the other. Then compare the second face to see how the two sets of impressions relate.
Broad overlap is different from one thick letter or small repeated outlines already present in a doubled die. Trace the actual crossing designs instead of inferring two blows from shine.
Confirm 1991 and P and compare the whole coin with the published ANACS example. No unreported direction of movement needs to be assumed to identify the two impressions.
Inspect any spreading and surviving edge for later damage. Prooflike fields may improve appearance but do not explain the overlapping pictures.
What It’s Worth
Estimated range: $300–$1,200 for identifiable double strikes, depending on separation, surviving date, and condition. The published 2009 FUN results record $1,092.50 for the ANACS MS64 PL example.
That historical result prices one clearly identifiable error coin. Less dramatic overlap or impaired surfaces call for weaker comparisons.
2. 1991 Half Dollar Half the Coin Remains Blank: Off-Center Strike Error
The PCGS MS62 1991-D illustrated in the same results is labeled 50% off center. A large area of its blank stayed outside the dies while part of the design missed the metal.
This is a displacement of the blank, not simply a weak strike. The original bare area and the absent design explain one another.
How to Identify
Keep the entire outer edge visible in photographs of both faces. Compare the unstruck area with the portion of the picture missing at the opposite side.
The boundary between stamped and untouched metal should support the same shift on both sides. An uneven rim on only one face may instead reflect a misaligned die.
Read the surviving date and D, then inspect for grinding or filing. Measure the actual outline rather than forcing a distorted coin into one standard diameter reading.
What It’s Worth
Estimated range: $150–$650 for dramatic identifiable examples; smaller shifts may be around $20–$100. The PCGS MS62 50% off-center coin sold for $546.25 in the 2009 FUN results.
MS62 means no circulation wear with noticeable marks. Another coin with the same displacement percentage still needs its date visibility, surfaces, and overall appearance compared.
3. 1991 Half Dollar A Wide Outline Contains Both Full Designs: Broadstrike Error
A broadstrike forms when the collar fails to contain the metal as intended. This ring normally limits diameter and creates the edge grooves.
Both designs can remain complete within the expanded outline. The 1991 guide discusses the possibility without identifying a separate certified example.
How to Identify
Measure several widths and compare with a normal half dollar. One wide-looking rim is weaker evidence than actual expansion beyond the normal outline.
Check that outer lettering and central designs remain complete on both faces. Missing design calls for a different explanation, including the off-center category above.
Spreading alone does not remove metal, so weight should remain reasonably close to normal. Inspect for hammer marks, flattened details, and edge filing that can imitate width or missing grooves.
What It’s Worth
Comparative estimate: $50–$300 for a genuine identified 1991 broadstrike. The supplied evidence does not establish a specific 1991 transaction.
A large 1977-D PCGS MS65 broadstrike brought $456 in December 2025. Its dramatic expansion and attractive unworn condition support a stronger comparison than a slightly widened or worn 1991.
4. 1991 Half Dollar A Shallow Opening Interrupts the Rim: Rim Clip Error
The Rippere collection 1991-D has a modest missing edge section rather than a large loss of portrait or eagle detail. GreatCollections listed it in January 2025 as ANACS AU58.
A clip begins with an incomplete blank before striking. The nearby design forms on the metal that remains, unlike damage inflicted on a finished edge.
How to Identify
Compare the shallow boundary and adjoining rim with the reference. Include enough border detail to show how the design meets the missing section.
Check for fresh burrs, filing, or a blow that pushed finished metal aside. Weakness opposite a clip can help, but a tiny clip need not create a dramatic flat area there.
Its weight loss may be small. Use an intact part of the outline for diameter comparison and keep the D and date in the same photographic record.
What It’s Worth
Estimated range: $20–$75 for a modest genuine rim clip with comparable slight wear. The 1991-D ANACS AU58 listing supplies identification but no publicly visible final price.
An unworn 1976-D clip graded ANACS MS64 sold for $89 in March 2025. It provides a better-condition comparison rather than the realized value of the smaller 1991 feature.
5. 1991 Half Dollar Part of Kennedy’s Design Was Blocked: Obverse Strike-Through Error
A collector’s 2021 post after grading identifies a front-side strike-through on a 1991-D. It does not name the material involved.
Something between the blank and die can leave an impression or prevent the design from forming. The front is also called the obverse.
How to Identify
Use the collector’s pictured example to locate the affected area. Preserve a whole-portrait view as well as the close-up.
Follow the boundary where normal detail meets the mark. Scrape tracks, cuts, or a raised lip from an impact may indicate damage after the design was already complete.
The mark’s shape alone cannot identify what obstructed the strike. Confirmation of the date and mint should accompany inspection of the original surface.
What It’s Worth
Estimated range: $50–$200 for a genuine visible front strike-through of this general kind. The 1991 report supplies no completed price.
A regular-metal 1976-D struck through on both sides sold for $114 in March 2025. That different-year comparison does not eliminate the need to judge the affected area, visibility, and condition of the actual 1991.
6. 1991 Half Dollar Both Small FG Letters Seem Absent: Missing Initials Check Error
Frank Gasparro’s initials FG normally appear beside the eagle’s leg and tail feathers. The 1991 guide suggests examining that spot without establishing a certified major named variety.
Heavy die polishing can remove the tiny recessed letters from the tool. Dirt, wear, or later abrasion can also conceal them on a coin.
How to Identify
Find FG on a normal Kennedy half first, then inspect the same area at 5× or greater magnification. Look for any surviving portion of either letter.
Describe visible remnants as weak initials rather than completely absent initials. Compare nearby detail with the overall wear and inspect for dirt, scratches, or smoothing.
An undisturbed-looking blank area is a starting observation, not a complete 1991 variety attribution. Keep the mint and finish with the evidence when seeking independent identification.
What It’s Worth
Comparative estimate: $20–$150 for an independently identified genuine 1991 example missing both initials through the die. This is not a recorded price for a recognized 1991 No FG variety.
Established 1982-P No FG coins provide context, including NGC MS66 results of $84 in early 2022. Their known attribution and unworn preservation cannot be transferred to a 1991 with merely faint letters.
Conclusion
A displaced single strike, a second overlapping strike, and a widened complete design need different whole-coin checks. The smaller clip, interrupted design, and missing-initials candidate depend on the structure of a particular area.
Estimated values span $20–$1,200, but only some categories have exact-year sale records here. Keep the $546.25 off-center and $1,092.50 double-strike results attached to their documented coins and grades.
