US Coin Grading Reference
What is coin grading?
Coin grading assesses the condition and eye appeal of a coin—key drivers of value. The U.S. market standard is the Sheldon 70‑point scale, where 1 is the lowest (barely identifiable) and 70 is perfect as struck. Grades group into four buckets: Circulated, About Uncirculated (AU), Mint State (MS), and Proof (PF).
1–59: Circulated60–70: Mint StatePF: Proof strikes (collector issues)
Sheldon Scale – Detailed Grades
Code
Grade
Range
Bucket
Notes
Special Designations
CAM / DCAM (Ultra Cameo)
Frosted devices with mirrored fields (proofs).
FB
Full Bands on Mercury dimes (split bands on fasces).
FS
Full Steps on Jefferson nickels (Monticello steps fully defined).
FH
Full Head on Standing Liberty quarters (complete helmet details).
RD / RB / BN
Copper color designations: Red, Red‑Brown, Brown.
Quick Tips
- Wear vs. Marks: Mint State coins can have marks from handling at the mint but show no circulation wear.
- AU vs. MS: AU‑58 often looks MS—check high points for the lightest friction.
- Proof ≠ Grade: Proof is a strike type; a proof can be PF‑63 or PF‑70, etc.
- Magnification: Many services reference ~5× when judging MS‑70 perfection.
- Eye appeal matters: Luster, toning, and strike quality influence value within the same numerical grade.
Educational reference for U.S. coin grading. Suitable for inclusion in a coin‑collection app or knowledge base.
