1963 Post Cereal Roberto Clemente #143 (HOF)  PSA Authentic.  Produced in smaller quantities than Topps, the Post Cereal issue is a bit tougher to find and definitely more condition sensitive.  Due to being hand cut within the border, PSA deems most of these as "authentic" without a numerical grade.  Hand cut cards have to be cut on or outside the intended border to be eligible for a numeric grade.