Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 669:
1960, National Philatelic Exhibition, blue overprint on imperforate souvenir sheet containing four 10c brown, commemorating Centenary of the first postage stamp, 11 examples, commemorative booklet is enclosed, all with full OG, NH (9) or VLH, VF, C.v. $385, Est. $100-$150, Scott #C211
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