Jose Canseco Autographed First Day Cover Sep 23 1988 "40/40 Player" (JSA)

Jose Canseco Autographed First Day Cover Sep 23 1988 "40/40 Player" (JSA).  Signed in blue pen across the front of the first day cover. This autographed first day cover is authenticated by James Spence Authentication Cert # AX93033.