O" (unrecorded by Proud and only two or three other examples believed to exist) with arrival d.s. on reverse, all in red; also 1861 (Feb.) envelope from the same correspondence bearing 1856-64 4a. black cancelled "B/147" with "PENANG/P.O." c.d.s. in red on reverse. Photo" /> cover 1861 envelope registered from Penang to India bearing 1856-64 1a. strip of four (on reverse - one defective), pair (discoloured at top) and two singles, each cancelled "B/147" and showing "PENANG/P.O." c.d.s., very rare small framed "REGISTERED/N<SUP>O</SUP>" (unrecorded by Proud and only two or three other examples believed to exist) with arrival d.s. on reverse, all in red; also 1861 (Feb.) envelope from the same correspondence bearing 1856-64 4a. black cancelled "B/147" with "PENANG/P.O." c.d.s. in red on reverse. Photo | Christie's