CU-1c-1982-13(LD) Cud

Description

Cataloged as CU-1c-1982-13(LD), this standard interior cud on the Zinc Large Date subtype documents a die break that extends beyond the peripheral rim into the design field, displacing a portion of Lincoln's portrait or the surrounding legend with a raised featureless plateau. The zinc planchet at 2.5 grams provides the softer substrate for this displaced metal, and the copper plating that gives the coin its familiar appearance stretches over the cud's surface in a way that can sometimes reveal the underlying zinc when examined under high magnification at the fracture boundary. Die crack propagation patterns on zinc planchets represent an area of active interest among die failure researchers: because the zinc-core blank deforms more readily under coining pressure than the harder bronze alloy, the distribution of stress across the die face differs between the two compositions, and whether this difference measurably affects how cracks initiate and propagate through the die steel remains an open empirical question. This entry's paired relationship with its bronze counterpart under the same census number provides exactly the kind of controlled comparison — same die, same fracture, different planchet — that can inform such analysis. Attribution by Cuds on Coins.

Attribution History

• Discovered by Jared Unger
• Expert attribution by Cuds on Coins

External References