cover 1927, 2fr First Air Post (C1), horizontal pair, used with other frankings (pairs of nos. 182 two and B18) on 1929 registered flight cover to Indo China, purple three-line crash cachet, very fine, Scott retail $365.00+ (as used stamps)

细节

cover 1927, 2fr First Air Post (C1), horizontal pair, used with other frankings (pairs of nos. 182 two and B18) on 1929 registered flight cover to Indo China, purple three-line crash cachet, very fine, Scott retail $365.00+ (as used stamps)