1975 Lincoln Memorial Cent - CU-1C-1975-11 Cud

Description

Extending the Philadelphia 1975 cud census to its eleventh entry, CU-1C-1975-11 records another terminal rim fracture on a die used to strike Lincoln Memorial cents at the Philadelphia Mint. Cuds form through a well-understood failure mechanism: as a die endures repeated high-pressure strikes, fatigue cracks propagate through the hardened steel, typically originating at stress concentration points along the rim where the die face meets the collar groove. When a crack reaches critical length, the affected section of rim separates entirely, and the resulting void fills with flowing planchet metal on each subsequent strike, producing the characteristic raised blob. The 1975 Philadelphia cent was produced in enormous quantities from the 95% copper alloy that had been standard for the denomination since 1962, and the sheer number of die pairs cycled through the presses ensured that a measurable percentage would develop rim fractures before being detected and replaced. CU-1C-1975-11 was cataloged by Cuds on Coins without additional cross-reference numbers from other attribution services, indicating it is documented exclusively within that catalog system. Attribution by Cuds on Coins.

Cross References

• CU-1C-1975-11

External References