CU-1c-1972-01 Rim Cud

Description

The first documented rim cud for the 1972 Philadelphia Lincoln Memorial cent, CU-1c-1972-01 was attributed by the Cuds on Coins team on September 15, 2018. No cross-references to other attribution services have been established. A rim cud develops when a piece of the die's edge breaks away completely, leaving a void in the die that fills with metal under striking pressure and produces a raised, featureless blob on the resulting coins at the corresponding rim location. Unlike die cracks (which are linear) or retained die breaks (where the broken piece remains partially in place), a full cud represents catastrophic material loss from the die's periphery. The 1972 Philadelphia cent — with its massive mintage requiring extensive die usage — provides favorable conditions for cud formation: dies pressed into prolonged service accumulate fatigue damage at their edges where stress concentrations from the collar interaction are highest. CU-1c-1972-01 as the first-numbered variety in the 1972 Philadelphia cud catalog represents a specific die whose edge failure produced a rim-area raised mass with geometry, position, and size that distinguish it from the subsequent cud varieties documented for this date. Collectors encountering a 1972 Philadelphia cent with a rim cud should compare the break's clock position, angular extent, and profile against reference imagery for all documented 1972 cuds to determine which specific catalog entry matches their specimen.

Attribution History

• Discovered by Adrian Fernandez
• Cross reference: none. 09/15/2018.
• Expert attribution by Cuds on Coins

External References