Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 98:
GROUP OF 12 AIR POST ISSUES: 1921-33, Bleriot XI first and second sets, Semi-Postal Air Post sets – Eagle, Aviation Pioneers and two imperforated sets of Biplane with upright and sideways watermark, full OG (three stamps with toned gum), NH, VF, C.v. $925, Est. $250-$300, Sc. #C1-8, CB3‑13, a, CB18a- 20a
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