cover 1890 (19 Jan.) stampless envelope to England headed "Field Service. Bearing. No Stamps Chin F. Force" showing, on reverse, the only recorded example of the "BASE OFFICE P.O./R/19 JA 90" single ring d.s., Pakokku, Bombay and arrival c.d.s., on front various tax markings. One of the most important items from this Expedition. Photo