Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1375:
1932-33, the sixth issue, two stamps with inverted black surcharges 3r and 5r on 35k ultra, both with full OG, NH, VF, each one with Soviet Philatelic guarantee hs, Standard Cat. #26Ta-27Ta
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