cover 1863 (3 June) envelope to Mrs. Brown in London, bearing India 1856 4a. black pair (small faults) cancelled "B/172" and sharing a fair strike of the very rare double-ring "OFFICE OF REGISTRY/SARAWAK" h.s. and with London Paid c.d.s. alongside, Singapore c.d.s. in red on reverse. Only three examples of this handstamp are recorded on cover. Photo