In the case of the 1942//1-D dimes, according to Lange, hubs of two different dates were used for the successive impressions of the die.Īs early as September 1941, dies were being prepared in the die shop at the Philadelphia Mint for 1942-dated production, while 1941-dated dies were still needed to strike calendar-year 1941 output.
Should the second impression be slightly misaligned from the first, a doubled die would occur, Lange explained. Mint sunk working dies from a working hub using two impressions, with a delay between impressions to heat or anneal the die, to soften it to accept the second impression.
