what is double die obverse on a coin
Mass / Weight: 6.25 grams. What this coin looks like (obverse, reverse, mint mark location, special features, etc.): There was a major Doubled Die Obverse (DDO) error on some 1937 Washington Quarters. This is best identified by the strong doubling of the words IN GOD WE TRUST. The 1937 date is also slightly doubled as well. An example image of this coin is depicted above.