CU-1C-1978D-08 Cud

Description

Rounding out the 1978-D cud entries in this batch, CU-1C-1978D-08 was cataloged by Cuds on Coins with the notation "number: none," indicating no additional cross-reference designations from other attribution services. This variety documents the eighth confirmed rim break on 1978 Denver Mint Lincoln Memorial cents — a substantial census that reflects the enormous die consumption rate at Denver during a year in which the facility produced approximately 4.28 billion cents. Each cud in the census represents a unique working die that suffered complete rim separation during production, and the specific break geometry of CU-1C-1978D-08 distinguishes it from the seven preceding entries. The cud formation mechanism is consistent across all instances: fatigue cracks nucleate at stress concentration points along the die rim, propagate through the hardened steel with each successive striking cycle, and eventually reach critical length, at which point a segment of the rim detaches entirely. The damaged die continues to operate until a press operator detects the anomaly, and during that interval, every coin struck receives the characteristic raised mass of extruded metal at the break location. Eight documented cuds places the 1978-D date among the more extensively cataloged Denver Mint issues in the Lincoln Memorial cent series for this error type. All 1978-D cents bear Denver's hand-punched mintmark and were struck from the standard 95% copper alloy. Attribution by Cuds on Coins.

Attribution History

• Discovered by Larry Peterson
• CU-1C-1978D-08; number: none.
• Expert attribution by Cuds on Coins

External References