cover 1881-95, a group of covers with 1888 opened out envelope to Princeton bearing U.S. 5c. and showing oval "U.S. POSTAL AGENCY/SHANGHAI" dated oval in purple, 1895 envelope cancelled by Shanghai duplex and three incoming covers from U.S.A. addressed to Shanghai, Foochow and Tunchow. (5)

Details
cover 1881-95, a group of covers with 1888 opened out envelope to Princeton bearing U.S. 5c. and showing oval "U.S. POSTAL AGENCY/SHANGHAI" dated oval in purple, 1895 envelope cancelled by Shanghai duplex and three incoming covers from U.S.A. addressed to Shanghai, Foochow and Tunchow. (5)