Die Cracks, Cuds & Die Varieties Explained
March 9, 2026
Die Cracks
As dies are used, stress causes cracks to develop. These appear as raised lines on struck coins. Small die cracks add minor interest; large, dramatic cracks can command premiums of $5–$50+.
Die Cuds
A cud forms when a piece of the die breaks away at the rim, leaving a blank, raised area on the coin. Cuds are more dramatic and valuable than cracks. Major cuds covering significant portions of the design can bring $50–$500+. The website cuds-on-coins.com catalogs known examples.
Die Varieties
Every die is unique. Intentional and unintentional differences create collectible varieties:
- Repunched dates (RPD) — Date punched more than once in slightly different positions.
- Repunched mint marks (RPM) — Mint mark punched multiple times. Common on pre-1990 coins.
- Die clashes — Obverse and reverse dies strike each other without a planchet, transferring ghostly design elements.
- Polishing varieties — Die polishing removes minor details, creating varieties like the 1937-D 3-Legged Buffalo.
Variety Attribution Systems
- Cherrypickers' Guide (FS numbers) — The standard reference for US coin varieties.
- VAM (Van Allen-Mallis) — For Morgan and Peace dollar varieties (6,500+ cataloged).
- CONECA — Combined Organizations of Numismatic Error Collectors of America. Maintains variety listings.
Up Next
This article is for educational guidance. Where official grading rules, dealer memberships, legal requirements, or tax obligations apply, consult the relevant primary authority.
Last reviewed March 9, 2026 by the US Coin Shows editorial team. Editorial policy
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