細節
Air Mail cover 1925 (12 Sept.) XU5 (light vertical crease) from Shanghai to Nagasaki bearing 3c. on 4c. cancelled by c.d.s. and showing framed "FIRST AIRMAIL/CHINA - JAPAN" h.s. in violet, carried on the de Pinedo flight (only 52 of the original 70 letters were recovered). Rare. Photo