CU-1C-1992-02 Rim Cud

Description

Designated as a rim cud, CU-1C-1992-02 identifies a 1992 Philadelphia Lincoln cent where the die fracture occurred at the extreme edge of the die face, producing a cud that sits directly on the coin's rim rather than extending into the design field. Rim cuds occupy the boundary zone between the die's working face and the collar that confines the planchet during striking, and their position along this structural junction reflects the concentration of mechanical stress at the die's outer perimeter. Each strike cycle transmits tremendous force through the die — hundreds of tons distributed across a 19mm circle — and the rim, being the outermost and thinnest portion, absorbs disproportionate stress where the die face meets the die's beveled edge. Over millions of impressions, micro-fractures accumulate in this high-stress zone until a chip separates, leaving a crescentic void at the rim. The resulting cud on the struck coin appears as a smooth, raised bump along the rim that obliterates whatever design element or lettering formerly occupied that position. Among the four cuds cataloged for the 1992-P cent, the rim designation differentiates this variety from interior or field cuds that break away from deeper within the die face. Struck at Philadelphia on copper-plated zinc planchets, 2.5 grams, 19mm, plain edge.

Attribution History

• Discovered by Steve Young
• CU-1C-1992-02
• Expert attribution by Cuds on Coins

External References