SD-1c-1972D-02 Split Die

Description

Second split die variety cataloged for the 1972-D Lincoln Memorial cent, SD-1c-1972D-02 records another instance of total die structural failure at the Denver Mint during the high-production 1972 coinage operations. A split die occurs when accumulated fatigue — from millions of high-pressure strikes — propagates cracks through the die body until the working face separates into two or more major pieces. Unlike the first split die for this date (SD-1c-1972D-01, which involved a capped die mechanism), SD-1c-1972D-02 carries no notation of additional compound error characteristics, suggesting it documents a more straightforward split die impression. The Cuds on Coins team cataloged this variety without establishing external cross-references. Coins struck from split dies exhibit diagnostic features that depend on the nature and timing of the split: if both halves remain in the die holder, the coin may show a major crack line with the two sections slightly misaligned; if one section shifts significantly, portions of the design may appear doubled, blurred, or displaced relative to other areas. The severity ranges from barely perceptible misalignment at the split boundary to dramatically distorted impressions where major sections of the design no longer register correctly with each other. Split dies in the Lincoln Memorial cent series are relatively scarce compared to ordinary cuds and die cracks because total failure typically triggers immediate press shutdown or die ejection — meaning the window for producing split die coins is narrow. The existence of two separate split die varieties for the 1972-D date underscores the extreme mechanical demands placed on Denver Mint dies during this record-production year.

Attribution History

• Discovered by Jon Sullivan
• Expert attribution by Cuds on Coins

External References