PCGS (Professional Coin Grading Service) is a famous company in the United States, which specializes in coin identification, grading and scoring. The identified coins will be put into a small sealed box and marked with scores and numbers. Its members can query related information according to the number through the network system.
First, the classification criteria are generally
In order to meet the need of constantly pursuing high-grade coins in American coin trading, the American Coin Association formulated the official ana grading standard for American coins (OAGS) in 1970s. This standard was compiled by Bresette and A.Kosoff, and has been revised and published many times. At present, this classification method is gradually popularized in the United States, but it has not been universally recognized internationally. The characteristic of this standard is that coins are divided into three grades: refined products, non-circulating products and circulating products. Then the suffix of each product has a certain number (3-70) to indicate its level. After this standard came out, it was quickly accepted by everyone because it was clear and reasonable. Both buyers and sellers in the market have urgent requirements for a unified standard.
Second, the coin rating is the evaluation of the appearance of the coin, which refers to the advantages and disadvantages of the physical state of the coin and the perfection of the surface of the coin. With the continuous improvement of the level of coin collection in various countries and the deepening of international coin exchange, the majority of coin lovers are paying more and more attention to the appearance of coins. Coins with excellent appearance are pleasing to the eye, but coins with serious wear and tear can't give people beauty.
Thirdly, collectors in China have no strict standards for judging the appearance of coins, and enthusiasts often use vague descriptions such as "complete finished products" and "top grade" to define the appearance, which is neither scientific nor unified. . The characteristic of this standard is that coins are divided into three grades: refined products, non-circulating products and circulating products. Then the suffix of each product has a certain number (3-70) to indicate its level. After this standard came out, it was quickly accepted by everyone because it was clear and reasonable. Both buyers and sellers in the market have urgent requirements for a unified standard.