1997 (P) Lincoln Memorial Cent - CU-1C-1997-03 Cud

Description

Cuds rank among the most collectible die errors because their raised featureless mass is immediately visible to the unaided eye — unlike many doubled die or repunched mintmark varieties that require magnification for detection. The fracture mechanics behind cud formation involve progressive metal fatigue at the die rim, where each strike concentrates compressive stress at the transition between the die cavity and the retaining collar. Over thousands of impressions, microscopic cracks initiate and propagate until a section breaks free entirely. The 1997 date falls within the copper-plated zinc era of Lincoln Cent production, where planchets consist of a zinc core with a thin copper coating — a composition adopted in mid-1982 to reduce the metal cost per coin. Cross-referenced as CU-1C-1997-03 and documented by Cuds on Coins, this die break variety contributes to the census of Memorial Cent cuds spanning the full 1959-2008 production window of Frank Gasparro's beloved reverse design.

Cross References

• CU-1C-1997-03

External References