Description:Frank Baker autographed 1939 Centennial cachet. Original June 12, 1939 First Day of Issue postmarked "A Century Of Baseball" cachet has been signed "J. Franklin Baker" in ink rating 7/8 out of 10. Hint of light toning and wear. Includes auction LOA from JSA: Sig. EX/MT-NM, Cover EX-EX/MT