This product is a 1964 Topps Giants Carl Yastrzemski #48 baseball card autographed by the HALL OF FAMER himself. The card has been grades at PSA 4 authenticated by Professional Sports Authenticator (PSA), with the autograph Graded  9, the authentication number 130310258. It is a valuable collectible item for fans of Major League Baseball, specifically the Boston Red Sox and Carl Yastrzemski, a member of the MLB Hall of Fame. This signed card is a rare and sought-after piece for collectors of vintage baseball memorabilia.