Description:Ty Cobb auto. Centennial baseball postage stamp. Vintage 1939 Baseball Centennial stamp signed in black fountain pen, "Ty Cobb 7/25/46". Signature rates 9 out of 10, stamp is affixed to 3"x5" unlined card with typewritten description. Includes LOA from PSA/DNA J.Spence-S.Grad: NM