1929-07-13, Flight Paris - Tokyo by Riegenot and Arrachart, leg Canton - Shanghai, express cover "Lignan University Canton" with handwritten "Par aeroplan Paris - Tokyo flight", postmarked Canton and addressed to Shanghai with recipient, two additional stamps and express label on reverse - 33 express covers do not bear the airmail franking, quite unusual item
6; Flugpost; FLUGPOST INTERNATIONAL; China