cover SWATOW: 1899 (11 Apr.) 1c. "I.C.P." stationery card with additional "C.I.P." 1c. and 2c. cancelled by fine strikes of the Swatow dollar chop with Hong Kong 4c. grey cancelled by the "I.P.O." tieprint and Hong Kong c.d.s. with Potsdam arrival c.d.s. at left; some toning