Crown/PERTH/WESTERN AUSTRALIA" h.s. adjacent. One of the finest and earliest "Black Swan" penny covers extant. B.P.A. Certificate (1981)" /> cover 1854 (19 Sept.) envelope to England (28.11 arrival backstamp), bearing 1d. black horizontal strip of four, close or touched on three sides and tied by "1" numeral grid of Perth, red oval "GENERAL POST OFFICE/<I>Crown</I>/PERTH/WESTERN AUSTRALIA" h.s. adjacent. One of the finest and earliest "Black Swan" penny covers extant. B.P.A. Certificate (1981) | Christie's