cover 1885 (15 Apr.) India ½a. stationery envelope addressed to Karachi, cancelled by "FIELD P.O." c.d.s. and bearing, on reverse, India 1873 ½a. and 1882 2a. cancelled in ink "15/4/85" and later by "B" in circle of bars. The envelope roughly opened at left though not affecting text or postal markings. Photo