INVENTORY

View sold Mint Errors in our Archives

New Listings

1977 Lincoln Cent
Struck on an Aluminum Planchet
At The U.S. Mint in Philadelphia
1.04 Grams
NGC MS 60
UNIQUE
Price On Request

slabblankslab


1972-S Proof Ike Dollar Mated Pair
Ike Dollar Struck on a 1¢ Planchet
mated with an
Ike Dollar Struck on a 10¢ Planchet
NGC Proof 67
AMAZING UNIQUE DISCOVERY
Price On Request

SlabblankSlab
blank
SlabblankSlab


U.S. 1970-S Proof Washington Quarter
Overstruck on a Canadian Quarter
King George V (1911-1936)
NGC PF 64
UNIQUE DISCOVERY COIN
$25,000

slabblankslab


Proof 1776-1976 S Bicentennial Quarter
Double Struck on Struck Roosevelt Dime
DOUBLE DENOMINATION
PCGS PR 67 CAMEO
Unique Discovery Coin
$50,000

slabblankslab


Proof 1776-1976 S Bicentennial Quarter
Overstruck on 1967 Roosevelt Dime
Double Denomination & Dual Date
NGC PF 67
UNIQUE
$35,000

slabblankslab


Unique Gold Obverse Trial Strikes
World-Class Numismatic Rarity
Matthias II - Holy Roman Emperor
c.1612 Gold Coronation Medals
Matthias II and Anna
German States - Frankfurt am Main
Plate Coins in Forschner
Forschner #34.1 Gold & #34.3 Gold
PCGS MS65 and MS64
$150,000

slabblankslab


1974-S Aluminum Lincoln Cent
Struck by the Obverse Die Only
On Philippine 1 Sentimo Planchet
PCGS MS 61
UNIQUE
$40,000

slabblankslabblankSlab


1876 Liberty Seated Dime
Struck 20% Off-Center
With Obverse Partial Brockage
NGC MS 63
$12,500

Slab


1863 Round Liberty Gold 25¢
California Fractional Gold BG-820
Overstruck on 1860/50 BG-819
NGC MS 61
UNIQUE DISCOVERY COIN
$20,000

Slab


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
UNLISTED IN GOLD AND UNIQUE
World-Class Numismatic Rarity
54.43 grams   42.59 mm
Hauser-536 (in Tin & Bronze)
PCGS SPECIMEN 62
$100,000

slabblankslab


(Circa 1806) German States Bavaria
King Maximilian I Joseph (1806-1825)
Historic Gold Service Medal by Losch
6 Ducats   20.96 grams   36mm
Unlisted in Gold
Wittelsbach #2478 (In Silver)
PCGS Specimen 65
(High Relief Cameo Proof-Like)
FINEST KNOWN & EXTREMELY RARE
$60,000

slabblankslab


1945-S Walking Liberty Half Dollar
Double Struck
Second Strike 55% Off Center
PCGS MS 63
Finest Known
$65,000

slabblankslab


1938 New Rochelle Half Dollar
PCGS Specimen 67+ CAC
Second Finest Known
$15,000

slabblankslab


Spain 1856 100 Reales
Queen Isabella II
Obverse & Reverse Die Trials
Queen Approved New Design by Royal Decree
Struck in Gilt Copper - Uniface
NGC PR 65 & PR 64
UNIQUE & UNLISTED NEW DISCOVERY
$25,000

slabblankSlab


1869 Standard Silver Half Dollar
J-742b
Without Initial "B" On Ribbon
PCGS PR 64+ CAC
UNIQUE, UNLISTED & UNRECORDED
$35,000

slabblankslab




U.S. Mint Errors, Die Trials & Patterns



1904 $20 DOUBLE STRUCK
Rotated 180 Degrees in Collar
NGC MS 62 CAC
BYERS COLLECTION
UNIQUE
$150,000

slabblankslab


U.S. 1970-S Proof Washington Quarter
Struck on a 1941 Canadian Quarter
TWO COUNTRIES & TWO DATES
NGC PF 65
UNIQUE
FEATURED ON FOX NEWS!
$35,000

slabblankslab


1970-S Proof Washington Quarter
Struck on a Silver Barber Quarter
NGC PF 65
1 of 2 Known
$75,000

slabblankslab


1870 Standard Silver 10¢ Judd #837
Broadstruck on a Copper Nickel (CN) Planchet
(Instead of a Silver Planchet)
76% Cu, 24% Ni, .99 Grams
Proof Pattern Off-Metal Mint Error
PCGS PR 65
UNIQUE
$20,000

slabblankslab


Mexico 1916 Oaxaca Gold 60 Pesos
Struck on a U.S. $10 Liberty (1838-1907)
World-Class Numismatic Rarity
NGC AU 53
UNIQUE
$150,000

slabblankslab


1928 Standing Liberty Quarter
Struck On A Cent Planchet
NGC MS 63 BN
From The Byers Collection
$60,000

slabblankslab


1922-S Peace Dollar
Struck 15% Off Center
PCGS MS 65
Finest Known
$75,000

slabblankslab


Unique 1943 Lincoln Cent 5-Piece Set
Including An Experimental Antimony Test Piece
And An Experimental 1943 Copper Blank and Zinc Test Blanks
NGC
$100,000

slabblankslab


1900 Indian Head Cent
Multi-Struck 20% Off-Center
On A Silver Dime Planchet
NGC MS 66
UNIQUE
$60,000

slabblankslab


U.S. Mercury Dime Dies
From The Philadelphia Mint
1935 Obverse and Reverse Pair
NGC Certified & Encapsulated
BOTH ARE UNIQUE IN PRIVATE HANDS
$25,000

slabblankslab

dieblankdie


2000 Lincoln Cent
Struck Onto 2000-P New Hampshire Quarter
PCGS MS 65
Extremely Rare
$17,500

slabblankslab


2001-P Sacagawea Dollar
Struck On A 5¢ Planchet
PCGS MS 64
3 Known
$30,000

slabblankslab


(1864-66) Julian-PR-30, AV 19mm
Washington - Lincoln
NGC MS 66 DPL
$15,000

slabblankobv


Undated Julian-PR-41, AV 19mm
Lincoln - Garfield
NGC MS 64 DPL
$15,000

slabblankobv


Undated Julian-PR-40, AV 25mm
Lincoln - Garfield
NGC PF 63 Ultra Cameo
$15,000

slabblankobv


(2011-2013) U.S. Quarter Test Strike
Judd #2225 - Mint Cancelled
New Martha Washington Die Design
NGC Brilliant Uncirculated
UNIQUE (The Only Coin in Private Hands)
$10,000

slabblankslab


U.S. 25¢ Stainless Steel Feeder Finger
From The Denver Mint Grabener Press
Authenticated and Encapsulated by NGC
UNIQUE (Not Struck by Coin Dies)
$7,500

slabblankslab


1870 Pattern 25¢ J-896
Incomplete Punched Planchet
PCGS PR 64 RB
UNIQUE
$7,500

Slab


1986 $1 American Silver Eagles
Set of 4 Weakly Struck
NGC Certified
$5,000

obvblankslabblankrev


1871 Liberty Gold 25¢ Pair
California Fractional Gold BG-838
Clipped Planchet & Double Clipped Planchet
Both Punched From The Same Gold Strip
PCGS
UNIQUE PAIR
$5,000

slabblankSlab


1855 Octagonal Liberty Gold Dollar
California Fractional Gold BG-533
Incomplete Punched Planchet
PCGS XF 45
UNIQUE
$10,000

Slab




World Mint Errors, Die Trials & Patterns



(1887) Great Britain Queen Victoria
Lauer Victoria Pattern in Gold
Obverse Die Trial - Uniface
World-Class Numismatic Rarity
10.16gr Gold, 27.2mm
Ex. Murdoch Collection (1904)
NGC Medal PF 63 Cameo
UNIQUE
$75,000

slabblankslab


1880 Great Britain Proof Half Sovereign Pattern
Struck in Silver (Instead of Gold)
MULED with a Sixpence Obverse
KM-PnA118blankWR-354 Var Silver
PCGS PR 64
UNIQUE
$75,000

slabblankslab


1985 Canada National Parks Proof $100
Unofficial Platinum Strike Uniface
(Platinum Mint Error or Pattern/Die Trial)
90% Pt, 10% Rh, 16.73 Grams
PCGS PR 67 Deep Cameo
UNIQUE
$75,000

slabblankslab


1985 Proof $100 Canada
National Parks Commemorative Gold Coin
Mated Pair of Die Caps
PCGS PR 69 DCAM & PR 67 DCAM
UNIQUE (The Only Die Caps In Existence)
$100,000

slabblankslab


1845 Great Britain Crown
Young Head Silver Die Trial
Piedfort Pattern
Uniface Obverse
NGC MS 65
UNIQUE, UNLISTED & UNRECORDED
$50,000

slabblankslab


1824 Great Britain Half Sovereign
GOLD Obverse Die Cap
Ex: Eliasberg
NGC MS 64
UNIQUE
$40,000

slabblankslab


Proof 1992 Canada $15
Struck on $50 Gold Planchet
DISCOVERY COIN
NGC PF 68 Ultra Cameo
Extremely Rare
$25,000

slab


(1904) Belgium Franc
GOLD Obverse Die Trial
1904 Design Overstruck on 1903 Design
Struck on Oversized Piedfort Planchet
(Regular Issue Was Struck in Silver)
NGC MS 61
UNIQUE
$40,000

slabspaceslab


1911 Great Britain 5 Pound
Uniface Obverse Die Trial
Struck In Lead From PROOF DIE
Width 44.32mm, Thickness 5.69mm
Authenticated by The Royal Mint
Pedigreed To The C.M. Kraay Collection
NGC MS 60
UNIQUE
$25,000

slabblankslab


Germany Third Reich Matte Proof Set in Silver
blank
1937A 2 Mark Hindenburg/Swastika
Matte Proof 62 PCGS UNIQUE
blank
1936A 5 Mark Hindenburg/Swastika
Matte Proof 63 PCGS UNIQUE
blank
1935A 5 Mark Hindenburg/Eagle
Matte Proof 62 PCGS 3 Known
blank
Unique Set (The Only One In Existence)
$50,000

slabblankslabblankslab
blank
slabblankslabblankslab


1932G Germany 5 Mark
Reverse Trial Strike in Silver
Johann Goethe
NGC PF 62
UNIQUE & UNLISTED
$15,000

slabblankSlab


1980 Canada Cent
Struck with Two Reverse Dies
PCGS MS 64 Red
1 of 2 Known
Featured on the Front Page of Coin World
$20,000

slab


1970 Canada 50-Cent
Struck on 12.1 Gram Gold Planchet
PCGS MS 64
1 of 2 Known
$30,000

slabblankslab


1969 Canada 25-Cent
Struck on 1963 Great Britain Gold Sovereign
Double Denomination
PCGS MS 64
1 of 2 Known
$40,000

slabblankslab


Germany Weimar Republic
5 Mark 1932/1 Overdate
Oak Tree
PCGS AU 55
One of Two Known
$10,000

slabblankobv


1986 Canada ½ oz Maple Leaf $20
Brass Uniface Die Trials
(Obverse and Reverse)
PCGS Specimen 66 & Specimen 67
UNIQUE PAIR
$7,500

slabblankslab


"Two-Tailed" Off-Metal 10 Cent Euro
Struck With Two Reverse Dies
On Chrome Plated Iron Planchet
NGC MS 65
Two Known
$7,500

slabblankslab


1831 Great Britain 1/2 Sovereign
Reverse Pattern
Gilt Uniface Reverse
NGC Proof 65 Ultra Cameo
UNIQUE & UNRECORDED
$10,000

slabblankslab


(1816) Great Britain Guinea/Sovereign Pattern
W&R-182 Copper
NGC MS62BN
UNIQUE
Recently Surfaced After 200 Years!
$10,000

slabblankslab


(1911) Great Britain 1/2 Sovereign
Uniface Obverse Die Trial
Struck In Lead
Width 25.63mm, Thickness 3.95mm
Authenticated by The Royal Mint
Pedigreed To The C.M. Kraay Collection
NGC MS 63
UNIQUE
$7,500

slabblankSlab


1899 Belgium 50 Centimes
1899 Reverse Muled with a 1907 Obverse
Bogaert-1306-B1
NGC MS 63
Two Known
$2,500

SlabblankSlab


1711 Germany Taler
Hesse-Cassel HOF-6275
Death of Maria Amalia
Struck in Lead
Ex-Cassel Collection
NGC AU 55
UNIQUE
$7,500

slabspaceslab


Set of German Proof Zinc Off-Metals
Wurttemberg 1914 2 Mark NGC PF 62
Wurttemberg 1914 3 Mark NGC PF 61
Unlisted in Schaaf, Beckenbauer and KM
UNIQUE (The Only Known Set)
$7,500

slabspaceslab


Great Britain Trial Strike
For Queen Elizabeth II Crown
Royal Mint (1957)
CuNi 38.5mm
Struck with 2 Obverse Dies
PCGS MS 62
UNIQUE
$7,500

slabblankslab


5 Denomination Canada Reverse Die Trials
For The Gold Maple Leaf Series
Struck in Brass and Gold Plated
Issued by the Royal Canadian Mint
10 Known Sets in Lucite
$7,500

lucite


Set of (2) South Africa Currency Test Proofs
Certified by PCGS Currency
UNIQUE
$7,500

frontspacefront


Canadian 1954 $20 Face and Back
Specimen Test Print
Certified by PCGS Currency
UNIQUE
$3,500

front


American Bank Note Company
Experimental Stamp Printing Plate
Steel 2.5" x 3.5"     Plate No. 25894
1 of 2 Known
$10,000

Slabblankplate


American Bank Note Company
1948 El Salvador Stamp Printing Plate
Complete Set of All Four Denominations
Steel 3.25" x 7.25"     Plate No. 7974
UNIQUE
$7,500

SlabblankSlab


Official Royal Mint Plaster
For the Great Britain 1983 One Pound
Official Adopted Design by Eric Sewell
(Former Chief Engraver of the Royal Mint)
Approved by Queen Elizabeth II
Possibly Unique
$15,000

Slab

Terms of Saleblank|blankView our Archives

Rare Coin Inventory  |  About  |  Contact  |  News
Terms and Info  |  Glossary  |  Calendar  |  Home
Mike Byers Fine Art eBay
World's Greatest Mint Errors Mint Error News
MIKE BYERS INC
8545 W. Warm Springs Rd, Ste A-4 #340, Las Vegas, NV 89113 mike@mikebyers.com   |   714.914.6415
Copyright © 1998-2020 Mike Byers Inc. All rights reserved. Website by Sam Rhazi Web Design. Legal Notice