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PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [2] Initially, many sports card dealers were ...
Collectors Universe. Collectors Universe Inc. is an American company formed in 1986, now based in Santa Ana, California, which provides third-party authentication and grading services to collectors, retail buyers and sellers of collectibles. Its authentication services focus on coins, trading cards, sports memorabilia, and autographs.
Cards are evaluated by third-party services, most often Professional Sports Authenticator (PSA), Beckett Grading Services (BGS) and Sportscard Guaranty (SGC), and given a grade on a ten-point scale based on condition. The images below do not necessarily represent the individual specimen sold but are representative of the given cards.
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Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.
Professional Coin Grading Service ( PCGS) is an American third-party coin grading, authentication, attribution, and encapsulation service founded in 1985. The intent of its seven founding dealers, including the firm's former president David Hall, was to standardize grading. [4] [5] The firm has divisions in Europe and Asia, and is owned by ...
Prostate cancers are graded according to a Gleason score. The higher the grade the more likely the cancer will spread quickly and grow. ... PSA testing is known to result in false positives, ...
The Professional Sports Authenticator (PSA) company graded this card a PSA 8 Near Mint-Mint (NM-MT) on their 10-point scale, the highest grade given to a T206 Honus Wagner card. Bill Hughes was the official grader of the card, working for PSA at the time. Hughes admitted to knowing that the card had been altered when he graded it.