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Mint Errors, Die Trials & Patterns
(sorted by highest price first)


1812 $5 Capped Bust
Double Struck, First Strike Off-Center
BD-1, Wide 5D
Pedigree: Harry W. Bass, Jr. Collection
PCGS MS 66
Extremely Rare
$200,000

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Uncancelled Costa Rica Proof Obverse Die
Made by the U.S. Mint in Philadelphia
For the Extremely Rare 1897 2 Colones
Struck at the Philadelphia Mint
Total Mintage of 500 Proof Gold Coins
Certified by NGC
UNIQUE NUMISMATIC DISCOVERY
Unpublished & Previously Unknown!!
$150,000

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1904 $20 DOUBLE STRUCK
Rotated 180 Degrees in Collar
NGC MS 62 CAC
BYERS COLLECTION
1 of 4 Known
$150,000

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1978-P Mint State Eisenhower Dollar
Overstruck on a
1978-S PROOF Eisenhower Dollar
Struck at the Philadelphia Mint
AND the San Francisco Mint!
NGC MS 67
Piece de Caprice
UNIQUE
$100,000

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1971-S Proof Eisenhower Dollar
Overstruck on a Bronze
San Francisco Assay Office Medal (17.1g)
NGC PF 69 RED CAMEO
UNIQUE
$100,000

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1973-S Proof BRONZE Eisenhower Dollar
Broadstruck on Bronze Planchet
PCGS PR 62 RED CAMEO
(Previously NGC PF 61 CAMEO)
BYERS-FROHMAN
UNIQUE
$100,000

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1976-S Proof Bicentennial Eisenhower Dollar
Double Struck
Second Strike Off-Center
NGC PF 64⭑
UNIQUE
$100,000

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Martha Washington Obverse Die
Used to Strike Half Dollar Experimental
Test Pieces for U.S. Judd #2131
NGC Certified & Encapsulated
1 of Only 2 Known In Private Hands
$75,000

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Martha Washington Reverse Die
Used to Strike 1 Cent Experimental
Test Pieces for U.S. Judd #2180
NGC Certified & Encapsulated
UNIQUE in Private Hands
$75,000

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1973-S Proof Ike Dollar "Clover Leaf"
Struck on Three Dime Planchets
PCGS PR 65
$75,000

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1921 Peace Dollar Plaster
Designed & Sculpted by Anthony de Francisci
UNIQUE in Private Hands
$60,000

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1921 Peace Dollar Splasher
Judd A1921-1
High Relief
PCGS UNC Detail
UNIQUE
$60,000

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1906-D $20 Liberty
Broadstruck (Out of the Collar)
PCGS AU 58
BYERS-FROHMAN
1 of Only 2 Known
$50,000

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The ONLY Proof Ike Dollar Mated Pair
Struck On A Dime & Nickel Planchet
NGC PF 65
UNIQUE
$50,000

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Uncancelled Costa Rica Obverse & Reverse Dies
Made by the U.S. Mint in Philadelphia
For the 1897 Gold 10 Colones
Struck at the Philadelphia Mint
Certified by NGC
Unique in Private Hands
$50,000

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Uncancelled Costa Rica Obverse & Reverse Dies
Made by the U.S. Mint in Philadelphia
For the 1897 Gold 20 Colones
Struck at the Philadelphia Mint
Certified by NGC
Unique in Private Hands
$50,000

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2001 Sacagawea Dollar
Unique Mated Pair
NGC MS 66
$50,000

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Charles A. Lindbergh
14-Inch Obverse Bronze Galvano
For The 1928 Congressional Gold Medal
Designed and Sculpted by Laura Gardin Fraser
UNIQUE in Private Hands
$50,000

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1970-S United States Proof Washington Quarter
Overstruck on a
1941 Canadian George VI Silver Proof Quarter
PCGS PROOF 66 (previously NGC PF 65)
UNIQUE
$40,000

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Jefferson Nickel Die Trial
Reverse Electrotrial
by Anthony De Francisci
Judd #JC1938-1
PCGS MS 62
UNIQUE
$40,000

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1861 German States Bavaria Medal
Prince Adalbert (Brother of King Maximilian II)
Gold Off Metal Strike
"First Test" (Trial Strike)
Hand Engraving from the Bavarian Mint
Presented to the House of Wittelsbach
Pedigreed to Prince Adalbert
UNLISTED IN GOLD AND UNIQUE
World-Class Numismatic Rarity
16 Ducats   54.43 grams   42.59 mm
Hauser-536 (in Tin & Bronze)
PCGS SPECIMEN 62
$40,000

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Charles A. Lindbergh
14-Inch Plaster Model of the Reverse
For The 1928 Congressional Gold Medal
Designed and Sculpted by Laura Gardin Fraser
$35,000

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1907 $20 Liberty Gold
DOUBLE STRUCK
Second Strike Partial Collar
NGC MS 62
1 of Only 4 Known
$25,000

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1944 Lincoln Cent
Overstruck on a 1944 Netherlands 10C
Double Denomination
NGC XF 45
UNIQUE
$25,000

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Bolivia 1942 50 Centavos
Struck at the Philadelphia Mint
On a U.S. Wartime Nickel Planchet
4.9g - Whittier Collection
NGC MS 65
UNIQUE
$25,000

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Kennedy Half Dollar
Struck on a Copper-Zinc Planchet
83% Cu, 17% Zn
Weight 2.4 grams
Likely Struck on an Experimental Cent Planchet
NGC MS 64 RB
UNIQUE
$20,000

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Proof 1973-S Kennedy Half Dollar
Die Piece and Die Break Error Mated Pair
NGC PF Cameo
1 of 2 Known
$20,000

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1974 Canada $5 Olympic Commemorative
Off-Metal Mint Error
Struck on Experimental Silver Planchet
Intended for Uniface Essay Trial Strikes
PCGS MS 64
UNIQUE
$15,000

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Eisenhower Dollar
Struck 35% Off-Center
On Taiwan $1 Planchet
PCGS MS 64
UNIQUE
$15,000

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1845 Great Britain Shilling
Queen Elizabeth Young Head
Obverse Die Cap
Also Struck 15% Off-Center
PCGS AU 58
UNIQUE
$12,500

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Great Britain 2023 5 Pound
2oz .999 Silver Planchet
Tudor Beasts - Bull of Clarence
Struck on a 2 Pound 1oz Planchet 39.2g
NGC MS 68
Unique Off-Metal Discovery
$5,000

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