U.S. and Worldwide Stamps & Postal History August 9-10, 2016
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Lot #1136 POLAND Air Post 1952 set of four imperforate blocks of four, also imperf. singles used on two registered covers to England, plus 1954 Kosciuszko, 60gr dark blue, sheet corner margin block of four, n.h., v.f. (Fischer 590-93A, 741s) ** Catalog #C28-31