Question 1

What is the Sheldon Scale?

Accepted Answer

The Sheldon Scale is a 1-70 numerical grading system for coins, developed by Dr. William Sheldon in 1949. Grades 1-58 indicate circulated coins (Poor to About Uncirculated). Grades 60-70 indicate uncirculated or proof coins (Mint State/Proof). Higher numbers mean better condition and typically higher value.

Question 2

What is the difference between MS-60 and MS-70?

Accepted Answer

MS-60 is the lowest Mint State grade—no wear but may have bag marks, scratches, or weak strike. MS-70 is perfect: no flaws under 5x magnification, full mint luster, and sharp strike. Most uncirculated coins grade MS-63 to MS-66.

Question 3

Should I get my coin professionally graded?

Accepted Answer

Professional grading (PCGS, NGC, ANACS) is recommended for coins worth $50+ or key dates. Graded coins sell for more, are easier to authenticate, and come in tamper-evident holders. For common circulated coins, grading cost may exceed the coin's value.

Question 4

What does AU mean in coin grading?

Accepted Answer

AU stands for About Uncirculated. AU coins (50-58) have minimal wear—often less than 5% of the surface—and retain 50% or more of their original mint luster. They were briefly circulated or mishandled at the mint.

Question 5

How does grade affect coin value?

Accepted Answer

Grade has a major impact. Two otherwise identical coins can differ 10x or more in value based on condition. A Morgan dollar in G-4 might be $30; the same date in MS-65 could be $200+. Key dates show even larger spreads.

Question 6

What is a proof coin?

Accepted Answer

Proof coins are specially struck for collectors with polished dies and planchets, creating mirror-like fields and frosted devices. They're graded PF-60 to PF-70. Modern proofs are often worth more than business-strike uncirculated coins of the same type.

Coin Grading Guide

Sheldon Scale (1–70)

Characteristics

Value Impact

Coin Grading FAQs

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