cover CHUNGKING: 1899 (July) XU5 to U.K., bearing C.I.P. 10c. cancelled by c.d.s. with Hong Kong 10c. cancelled by "SHANGHAI" c.d.s. and struck by Chungking unframed "I.P.O." tie-print (Type 1) - an early usage of this h.s. Scarce. Photo