Glossary

Categories

Brockages
space
Counterbrockages
space
Die Adjustment Strikes
space
Die Caps
space
Die Trials
space
Double Denomination
space
Double/Multiple Strikes
space
Dual Countries
space
Experimental Blanks
space
Experimental Strikes
space
Experimental Surface
space
Feeder Finger Strikes
space
Gold Die Trials
space
Gold Errors
space
Gold Off-Metals
space
Intentional Errors
space
Martha Washington
Test Pieces

space
Mated Pairs
space
Mules
space
Multiple Errors
space
Off-Centers
space
Off-Metals
space
Overstrikes
space
Pattern Die Trials
space
Pattern Errors
space
Pattern Mules
space
Platinum Errors
space
Proof Errors
space
Specimens
space
Spectacular Errors
space
Transitional Errors
space
Two-Headed Coins
space
Two-Tailed Coins
space
Uniface Die Trials
space
Unique Coins


slabblankslab

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.