1929, Biplane with New Republican Flag, mixed frankings on six large-format airmail covers all from Hankow to Shanghai, some of the covers reused, various faults due to size, plus three covers incoming mail, thereof two from Switzerland to Shanghai with Pro Juventute franking and parts of Chinese registration label on reverse and attractive cover from South Africa (!) to Shanghai with ½ d Antilope as strip of 6
6; Übersee A-Z; CHINA; Markenausgaben
6; Overseas A-Z; CHINA; Stamp Issues