on piece -- 1901 (23 May) large part native cover to San Francisco bearing, on reverse, C.I.P. 10c., 20c. and 50c. vertical pair (short perfs at right) tied by Canton bi-lingual c.d.s., and Hong Kong 20c. on 30c. grey-green, 50c. on 48c. dull purple pair and 10c. blue tied by boxed "I.P.O." (Type 1) and Hong Kong c.d.s. (24.5). A most attractive franking. Photo