Description:1939 Philadelphia Phillies autographed Centennial Cover. Baseball Centennial cover has been signed on the front by (11) including Klein, Lobert, Brack, Prother, and others. Period black fountain pen signatures rate 7/8 to 9 out of 10. Cover exhibits a hint of age toning and is postmarked "June 12, 1939 Cooperstown NY." Includes auction LOA from JSA: EX-EX/MT