Utilizing a specially synthesized DNA technology provided by DNA Technologies, Inc. PSA/DNA provides legitimacy to autographed collectibles and helps combat the problem of counterfeits. Professional Sports Authenticator (PSA) is the world's largest third-party grading and authentication service. Each signature submitted for autograph authentication is thoroughly examined by the foremost signature expert in the industry. Life long experience, a nationally recognized reputation, the largest exemplary file in the hobby and formal training in the field of Forensic Document Examination combine to offer the most reliable service to identify autograph legitimacy.The opinion of the authenticators at PSA/DNA are respected throughout the hobby and are the authority when it comes to deeming a signature authentic. When you see PSA/DNA you can feel confident that you are receiving a genuine 100% Authentic signature. Please view my other auctions for more autographs! The item "1973 Topps NOLAN RYAN Signed Autographed Baseball Card PSA/DNA #220" is in sale since Saturday, August 10, 2019. This item is in the category "Sports Mem, Cards & Fan Shop\Sports Trading Cards\Baseball Cards". The seller is "frontrunner_sports_memorabilia" and is located in Houston, Texas. This item can be shipped to United States.