Categories
Bonded Coins

Broadstrikes

Brockages

Counterbrockages

Die Adjustment Strikes

Die Caps

Die Trials

Double Denomination

Double/Multiple Strikes

Dual Countries

Essay Trial Strikes

Experimental Blanks

Experimental Strikes

Experimental Surface

Feeder Finger Strikes

Foreign Coins Struck on U.S. Planchets

Galvanos

Gold Die Trials

Gold Errors

Gold Off-Metals

Hub Trials

Indents

Intentional Errors

Martha Washington
Test Pieces

Mated Pairs

Mules

Multiple Errors

Off-Centers

Off-Metals

Overstrikes

Pattern Die Trials

Pattern Errors

Pattern Mules

Plaster Models

Platinum Errors

Proof Errors

SMS Mint Errors

Specimens

Spectacular Errors

Struck Scrap

Struck Thru

Transitional Errors

Two-Headed Coins

Two-Tailed Coins

Uncanceled Dies

Uniface Die Trials

Unique Coins
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Pattern Errors
Major mint errors on United States patterns are extremely rare. There are a few known broadstrikes, double strikes, off-centers and off-metals.
Pictured above is a unique and spectacular mint error, a proof pattern off-metal. It was struck on a copper nickel planchet instead of a silver planchet. It's composition is 76% Cu and 24% Ni, which is copper-nickel. It weighs .99 grams. PCGS certified it Proof-65. It is the only known copper-nickel Standard Silver Dime in the entire 1869-1870 series, from Judd #837 through Judd #872. The official Standard Silver Dimes were struck in silver, copper and aluminum. |