1964 (D) Lincoln Memorial Cent - Doubled Die Reverse WDDR-003

Description

Cataloged as the third doubled die reverse variety for the 1964-D Lincoln Memorial Cent, WDDR-003 preserves a reverse hubbing anomaly from the Denver Mint's historic 1964 production year. The doubled die reverse mechanism is fundamentally the same as its obverse counterpart but operates on the opposite side of the coin: during reverse die manufacture, the reverse working hub — bearing Frank Gasparro's Lincoln Memorial design — was pressed into a die blank multiple times under hydraulic force, and a slight displacement between impressions left a permanent secondary image of the reverse design elements in the die steel. This volume consumed an enormous number of reverse working dies over the course of the year, each manufactured through its own independent hubbing session. The 1964-D cent was the last Denver Mint cent to carry the "D" mint mark before the 1965-67 suspension, a policy change enacted to discourage the speculative hoarding that had contributed to the shortage. Struck on a 95% copper and 5% zinc planchet at 3.11 grams and 19.05 mm diameter.

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