coins   1917

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PCGS Grading Standards
In 1948, Dr. William Sheldon, a renowned numismatist, developed the Sheldon Scale, assigning grades from "1" through "70" to coins. The basis of Sheldon’s theory was that a "70" would be worth 70 times as much as a "1."

PCGS built its grading standards upon the Sheldon Scale when it introduced the concept of encapsulated, third-party grading in 1986. Review the details behind the PCGS grading standards through our visual guide below or the classic table view.
coins 
7 days ago by fairyrevel
Coin Grading Made Simple
When numismatists grade coins, they are assigned a numeric value on the Sheldon Scale.
coins 
7 days ago by fairyrevel
Numismatic Guaranty Corporation
With an unparalleled commitment to accuracy, consistency and integrity, Numismatic Guaranty Corporation® (NGC®) is the world's largest and most trusted third-party grading service for coins, tokens and medals. Since 1987, NGC has graded more than 42 million coins, each one backed by the industry-leading NGC Guarantee.
coins 
4 weeks ago by bnwest
Professional Coin Grading Service
Professional Coin Grading Service (PCGS) is the most respected name in third-party coin certification. By establishing a universal grading standard, PCGS has paved the way for coin enthusiasts to enjoy buying and selling coins with confidence.

Coin Grading:
https://www.pcgs.com/whatiscoingrading

Grades:
https://www.pcgs.com/grades
coins 
4 weeks ago by bnwest
Milk Spots on Modern Silver Coins: How Big of an Issue? | Coin Update
For at least the past decade, articles have appeared periodically in the numismatic media about the issue of white-colored discoloration, known as milk spots, that appear on some modern silver coins.
coins  precious-metals 
8 weeks ago by fairyrevel

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