(Post Office) Gronouski, John A. (1919-1996), U.S. Postmaster General Sept. 30, 1963-Nov. 2, 1965. He also served as U.S. Ambassador to Poland 1965-1968 under Pres. Johnson. Here, his autograph on #1240 1963 Christmas FDC, during his tenure as Postmaster General (Image)

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