2021 (P) Lincoln Shield Cent - CU-1C-2021-06R Cud

Description

CU-1C-2021-06R is a reverse cud documented for the 2021 Philadelphia Mint Lincoln Shield Cent. Modern die steel — typically high-chromium tool steel hardened to approximately 58-62 Rockwell C — is engineered for extended die life, yet even contemporary dies eventually succumb to the cumulative stress of striking hundreds of thousands of coins. Die rim fractures remain a routine production phenomenon despite metallurgical advances over the past century. Historic die steels were softer and more brittle, producing cuds at higher rates per die pair. Cataloged by Cuds on Coins, the 2021-P reverse cud is a modern case study in die failure. Each of the entries documents a unique fracture — differing in rim position, fragment size, and resulting cud shape.

Cross References

• CU-1C-2021-06R

External References