The only mention of it that I can find is in Wikipedia... There are few varieties in the series, and they are relatively minor. They principally involve the mint mark: several repunchings, one overpunching of a D over an S in 1942, and some changes in size. One oddity is the 1943/1942, which is not a true overdate but was formed by a working die struck once from a 1942-dated master die, and once from one dated 1943.[27] Some 1946 half dollars show a doubled die on the reverse.[50]
