CU-1C-1985-20 Cud

Description

The Cuds on Coins catalog numbering system assigns each confirmed variety a sequential identifier within its denomination-date-mint grouping, and CU-1C-1985-20 on the 1985 Philadelphia Lincoln Memorial cent illustrates how this system operates. The prefix "CU" designates a cud error. The "1C" identifies the one-cent denomination. "1985" is the date, and the absence of a mint letter after the date indicates Philadelphia production (since Philadelphia cents of this era carry no mint mark). The sequential number "20" was assigned when this variety was confirmed and added to the registry. Numbers are not reassigned when varieties are delisted — the gap at CU-14, which was removed from the catalog, remains as a permanent placeholder to prevent confusion. This numbering convention allows collectors to reference any documented cud with a compact, unambiguous identifier. The system extends across all U.S. denominations, so a collector encountering "CU-5C-1985D-03" would immediately understand it refers to the third cataloged cud on a 1985 Denver nickel. The catalog also records the discoverer's name, the approximate position and size of each cud, and any cross-references to other attribution systems. Struck on copper-plated zinc planchets at 2.5 grams and 19mm from the 1985 mintage of approximately 5.65 billion cents.

Attribution History

• Discovered by Geoffrey Noe
• CU-1C-1985-20
• Expert attribution by Cuds on Coins

External References