, Calcutta G.P.O. c.d.s. and framed "AM"; also 1826, 1827 and 1829 pieces showing fine strikes of the same handstamp. Photo " /> <I> "Postpaid -- 2ans"</I>, Calcutta G.P.O. c.d.s. and framed "AM"; also 1826, 1827 and 1829 pieces showing fine strikes of the same handstamp. Photo | Christie's