Air Mail cover 1929 (12 Oct.) Hankow - Shanghai first flight cover addressed to New York bearing Air 15c. with Nanking Mausoleum 10c. cancelled by Nanking c.d.s.; the envelope with typewritten endorsement "By First Wuhan-Shanghai Air Mail" and with arrival backstamp, scarce. Muller 15a

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Air Mail cover 1929 (12 Oct.) Hankow - Shanghai first flight cover addressed to New York bearing Air 15c. with Nanking Mausoleum 10c. cancelled by Nanking c.d.s.; the envelope with typewritten endorsement "By First Wuhan-Shanghai Air Mail" and with arrival backstamp, scarce. Muller 15a