Bill McGowan Autographed First Day Cover; outstanding First Day of Issue postmarked June 10, 1989 Cooperstown, N.Y.; features 1994 Conlon card image on the left and a cut signature at the bottom right of the cover signed in steel tip fountain pen with "A.L. Umpire" inscription; McGowan founded the second umpire school in the United States and was inducted into the Hall of Fame in 1992. SGC Standard Cert AU36401.