, bearing 1856 4a. grey-black strip of four cancelled by "B/172" obliterators, showing red crayon "1/11", London Paid c.d.s. (29.8), "16/CENTS" accountancy h.s. in red, "BOSTON. AM. PKT./5" arrival d.s. (13.9) and, on reverse, "SINGAPORE/P.O." c.d.s. in red and blue oval f.a.c. of Boustead & Co. in Singapore. A very scarce and attractive franking. Photo" /> cover 1864 (July) entire to Boston, USA, marked<I> "Via Marseilles"</I>, bearing 1856 4a. grey-black strip of four cancelled by "B/172" obliterators, showing red crayon<I> "1/11"</I>, London Paid c.d.s. (29.8), "16/CENTS" accountancy h.s. in red, "BOSTON. AM. PKT./5" arrival d.s. (13.9) and, on reverse, "SINGAPORE/P.O." c.d.s. in red and blue oval f.a.c. of Boustead & Co. in Singapore. A very scarce and attractive franking. Photo | Christie's