What is the PSA grading on baseball cards?

Answer:

Professional Sports Authenticator

PSA; short for Professional Sports Authenticator was Founded in 1991. PSA was the first widely accepted grading service and set the standard for the graded card market. PSA graded cards are sonically sealed inside a protective, tamper-evident PSA holder with a tagged label that shows its certification number, manufacturer, grade, date, unique bar code and player's name. This label appears above the card that is graded. To get complete information on their card grading standards, visit their website.

Contributor: Steven
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