Glossary

Categories

Bonded Coins
space
Broadstrikes
space
Brockages
space
Counterbrockages
space
Die Adjustment Strikes
space
Die Caps
space
Die Trials
space
Dies
space
Double Denomination
space
Double/Multiple Strikes
space
Dual Countries
space
Essay Trial Strikes
space
Experimental Blanks
space
Experimental Strikes
space
Experimental Surface
space
Feeder Finger Strikes
space
Foreign Coins Struck
on U.S. Planchets

space
Galvanos
space
Gold Die Trials
space
Gold Errors
space
Gold Off-Metals
space
Hub Trials
space
Indents
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
Plaster Models
space
Platinum Errors
space
Proof Errors
space
SMS Mint Errors
space
Specimens
space
Spectacular Errors
space
Struck Scrap
space
Struck Thru
space
Transitional Errors
space
Two-Headed Coins
space
Two-Tailed Coins
space
Uniface Die Trials
space
Unique Coins


slab
Euro 50 Cent/20 Cent Mule

Mules

A mule occurs when a coin is produced with mismatched dies. In some countries, the Mints use dies for different denominations with the same dimensions. In these instances, mules have been known to exist and are not that rare.

An example would be a New Zealand/Bahama mule where thousands were struck and they are worth $50 each. The obverse of a Bahama 5 Cent piece was muled with the reverse of a New Zealand 2 Cent piece.

On the other end of the spectrum are the extremely rare mules including a few from the United States. An example would be a mule with a Sacagawea Dollar reverse and a State Quarter obverse.

The photo shown above is a rare example of a Euro 50 Cent reverse that was muled with a Euro 20 Cent reverse. This rare piece is also a "two-tailed" coin because both dies were reverse designs and both are denominations of Euro coinage.