cover 1900 (15 Jan.) native illustrated XU5 (light overall staining) to France (18.3 arrival) bearing Peace and Commerce 15c. vertical pair (cut off previous cover resulting in trimmed perfs. at left) with central unframed "I.P.O.". (Chungking type 1) and cancelled by "SHANG-HAI/CHINE" c.d.s., showing "CHUNGKING" origin c.d.s. (15.1) adjacent. Photo