1977 Lincoln Memorial Cent - CU-1C-1977-05 Cud

Description

Documented as the fifth rim break variety for the 1977 Philadelphia Lincoln Memorial cent, CU-1C-1977-05 continues the extensive cud census cataloged by Cuds on Coins. High-speed coinage presses delivered repeated blows at pressures sufficient to fully impress the design into copper planchets, and under this relentless mechanical cycling, even the best tool steel eventually succumbed to fatigue failure. The rim of a coinage die is particularly vulnerable because the sharp transition between the die face and the collar groove acts as a natural stress riser. When a fatigue crack reaches critical length, the affected rim section separates and a cud is born — each subsequent coin struck by that die carries a raised mass of metal where the design has been replaced by a featureless blob of extruded copper. CU-1C-1977-05 occupies its own distinct position on the die periphery, and precise identification requires comparison of the break's angular location and arc-length against the Cuds on Coins reference images for all documented 1977-P entries. Attribution by Cuds on Coins.

Cross References

• CU-1C-1977-05

External References