O 13" between bars (Ali Musjid) with the appropriate "FIELD P.O./APR 12/NO 13" c.d.s. and Bombay transit c.d.s on reverse. A rare cover posted just after the battle of Fatherabad. Photo" /> cover 1879 (12 Apr.) soldier's envelope (a few rust spots) from Sgt. J. Killmaster of the 10th Royal Hussars to London, countersigned by the C.O., bearing 8p. tied by "F.N<V>O 13" between bars (Ali Musjid) with the appropriate "FIELD P.O./APR 12/N<V>O 13" c.d.s. and Bombay transit c.d.s on reverse. A rare cover posted just after the battle of Fatherabad. Photo | Christie's