Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 462:
1949, 75th Anniversary of the UPU, 9p-2½a, two complete sets of four, postage and officials, perforation 17½x17, side margin blocks of ten, full OG, NH, VF, C.v. $360++, Est. $200-$250, Scott #26a-29a, O25a-28a
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