Lote 412

✉ HONG KONG. 1900. 1c. green Postal Stationery card used back from UK with Great Britain 1900 ½d. dull green tied by HALWELL datestamps in black and addressed to the 'Controller, General Post Office, Hong Kong'. SINGAPORE-TO-HONG KONG, code B datestamp at left (Aug 12). Reverse with POTMASTER GENERAL'S OFFICE / HONG KONG cachet in violet (Aug 17) and returned to sender with Hong Kong 4c. slate tied by despatch cds (Sept) in black. A rare and most appealing usage.