UDC-1c-2017P-01 Unusual Die Crack

Description

Classified under the UDC prefix—Unusual Die Crack—this variety on the 2017 (P) Lincoln Shield Cent documents a die crack that defies the standard categories into which most die failures are organized. The Cuds on Coins catalog maintains separate classification systems for spiked heads, pre-cuds, retained cuds, die breaks, and shattered dies, each defined by specific visual and structural criteria. When a die crack does not meet the diagnostic requirements for any of these established categories—perhaps following an atypical path across the die face, presenting an unusual morphology, or appearing in a location that standard classifications do not address—it receives the UDC designation. This catch-all category exists because die steel can fracture in ways that defy neat taxonomic boundaries, and the integrity of the other categories depends on having a valid alternative for cracks that resist classification. UDC-1c-2017P-01 was the first unusual die crack documented from the 2017 Philadelphia cent, preserving the anomaly for future study. Attributed by Cuds on Coins.

Attribution History

• Discovered by Marvin L
• Expert attribution by Cuds on Coins

External References