Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 118:
1927-30, International Air Post Conference and Zeppelin issue, three complete sets of two, last ones with perforation 12½ and 10½, full OG, NH, VF, C.v. $632.50, Scott #C1-11, C12-13, a
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