CU-1C-1978-03 Rim Cud

Description

Identified specifically as a rim cud in the Cuds on Coins catalog, CU-1C-1978-03 documents the third confirmed die rim separation on 1978 Philadelphia Lincoln Memorial cents. The designation "Rim Cud" distinguishes this variety from interior retained die breaks by confirming that the fracture extends to and includes the coin's rim — the outermost raised border that normally surrounds the entire design. When the corresponding die rim fragment separates, the resulting void in the die face creates a characteristic raised mass of metal that bridges the gap between the design field and the coin's edge, producing a smooth, featureless extrusion of copper where design elements and the rim once appeared. Rim cuds are the most common form of cud variety because the die rim represents the thinnest and most mechanically stressed region of the die face — it is the point where the die transitions from the flat working surface to the collar-contact zone, creating a geometric stress riser that concentrates fatigue damage during each striking cycle. Philadelphia's 1978 output placed heavy demands on its die inventory, and the documentation of multiple cuds for this date reflects the scale of die consumption during that production year. CU-1C-1978-03 carries no additional cross-references beyond its Cuds on Coins designation, and its attribution rests on the specific position and geometry of its rim break. Attribution by Cuds on Coins.

Attribution History

• Discovered by Tony Brubaker
• CU-1C-1978-03
• Expert attribution by Cuds on Coins

External References