cover 1893 "POSTAGE PAID 1 CENT" embossed envelope, opened out for display, with red wax seal on reverse struck by intaglio "AMOY LOCAL POST AGENCY" h.s.) to Hong Kong (17.6 arrival) showing bilingual "AMOY LOCAL POST/AGENCY" double-ringed h.s. in blue and bearing Hong Kong 5c. (stained at right), cancelled by "AMOY" c.d.s. (2.6). A very rare and spectacular Agency usage. Ex. Canman. Photo