CU-1C-1986-04 Rim Cud

Description

Classified as a rim cud rather than a standard interior cud, CU-1C-1986-04 on the 1986 Philadelphia Lincoln Memorial cent documents a fracture confined to the raised rim ring on the die face — the narrow border element that forms the coin's protective edge. Rim cuds differ from interior cuds in both their formation mechanics and their visual presentation. An interior cud results from a die section breaking away from the rim inward into the field, obliterating design elements and producing a dramatic raised blob. A rim cud, by contrast, involves separation of die material along the rim itself, producing an irregular thickening, flattening, or disruption of the coin's border without major intrusion into the adjacent design. The rim ring is the structurally thinnest portion of the die face, making it vulnerable to fractures that propagate along its circumference. Detection requires deliberate rim inspection under magnification, as the anomaly may be subtle compared to the visually striking profile of a full interior break. Authentication of rim cuds also demands care, since the effect can superficially resemble post-mint damage from counting machines, rolling equipment, or edge impacts. Genuine rim cuds exhibit uniform metal flow consistent with the striking event. Struck at Philadelphia on copper-plated zinc planchets (97.5% zinc, 2.5% copper) at 2.5 grams and 19mm.

Attribution History

• Discovered by Janice Egolf
• CU-1C-1986-04
• Expert attribution by Cuds on Coins

External References