1921-07-02, First Flight (Shanghai -) Tsinan - Peking, Vickers Vimy, Pilot C. A. Lewis, cover from Shanghai 07-21 with railway to Tsinan and with airmail to Peking 07-21 14:00 signed by pilot, envelope slightly trimmed on left side
6; Flugpost; FLUGPOST INTERNATIONAL; China
6; Airmail; AIRMAIL INTERNATIONAL; China