1940-S Doubled Die Obverse DDO-001

Description

Holding the primary DDO catalog position for the 1940-S Mercury Dime, DDO-001 displays light extra thickness on IN GOD WE TRUST, the date, and designer's initials AW on Adolph Weinman's obverse — three elements spanning the lower die that collectively confirm broad hub displacement. Cross-referenced as 1-O-VI in the CONECA system — variety 1, obverse, Class VI distorted hub doubling — a mechanism where the working hub deformed under pressure rather than shifting laterally or rotating. Class VI distortion produces subtle thickening of design elements rather than the clear directional shift of other doubling classes, accounting for the "light extra thickness" rather than directional spread. Die markers UVC-116 and DMR-002 confirm the specific working die. The 1940-S Mercury Dime was struck at the San Francisco Mint in 90% silver at 2.5 grams during the final peacetime production year before America entered World War II. Examine IN GOD WE TRUST under 7x magnification for broadened letter strokes, then verify thickening on the date numerals and AW initials at Liberty's neck truncation.

Die Markers

• UVC-116, DMR-002

Attribution History

• 1-O-VI

External References