Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 174:
1938 (September 17-25), Philatelic Exhibition at Aarau, souvenir sheet of 20c+20c+10(c)/65c, used on Exhibition air mail cover along with multicolored vignette, tied by special ”23.9.38” ds, blue Flight cachet and Bellinzona the same day arrival, VF, Est. $100-$150, Sc. #242
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