The primary purpose of this site is to serve as a source of information for collectors of coins with die varieties. What are die varieties? We define die varieties to be differences in the design that appears on the coins for a particular year and denomination. In the Wexler Die Variety Files we recognize two categories for die varieties - Intentional Die Varieties and Unintentional Die Varieties.

The Intentional Die Varieties are design differences on the coins for a particular year and denomination that were deliberately made by the U.S. Mint. These would include varieties like the 1960 Lincoln cents with Large Dates and Small Dates, the 1979-S and 1981-S proof Lincoln cents with different mint mark styles, etc. There are many of these design differences that the average collector is not aware of.

The Unintentional Die Varieties are design variations on coins for a particular denomination and year that were produced in error. These varieties include such errors as doubled dies, repunched mint marks (RPMs), over mint marks (OMMs), dual mint marks (DMMs), inverted mint marks (IMMs), repunched dates (RPDs), misplaced dates (MPDs), and overdates (OVDs).