CU-1C-1978D-01 Cud

Description

Cataloged as CU-1C-1978D-01 by Cuds on Coins, this variety documents the first confirmed rim break on 1978 Denver Mint Lincoln Memorial cents. The original catalog notation "number: none" indicates that no additional cross-reference number was assigned beyond the primary Cuds on Coins designation. A cud is produced when a fragment of die steel separates completely from the die's rim, creating a cavity that fills with planchet metal under striking pressure. The resulting raised, featureless mass of copper along the coin's edge is one of the most dramatic and recognizable error types in the series. Denver's 1978 production of approximately 4.28 billion Lincoln cents was among the highest outputs for the facility during the Memorial cent era, and the enormous die consumption rate that accompanied this volume made rim fractures a predictable outcome of the production process. Each working die endured hundreds of thousands of high-pressure strikes before retirement, and the cumulative fatigue loading inevitably produced terminal cracks at vulnerable points along the rim. CU-1C-1978D-01 initiates the cud census for the 1978-D date, and its specific break geometry — angular position, arc-length, and affected design elements — distinguishes it from subsequent entries. Denver's hand-punched "D" mintmark confirms the coin's origin. Attribution by Cuds on Coins.

Attribution History

• Discovered by Jon Sullivan on ebay
• CU-1C-1978D-01; number: none.
• Expert attribution by Cuds on Coins

External References