cover 1879 (4 Sept.) India ½a. envelope, uprated with ½a., 1a. (4) and 4a. (on face), registered to London, marked "Cabul field force" and "via Brindisi Stamped and Registered", all cancelled with "F. NO 12" in bars and showing, alongside the adhesives on reverse, boxed "REGISTERED/FIELD. P.O. NO 12/N. W. ", "FIELD P.O./NO 12" c.d.s. and Kohat transit c.d.s.; the envelope opened-out to reveal a remarkable exhibition item. Photo

Details
cover 1879 (4 Sept.) India ½a. envelope, uprated with ½a., 1a. (4) and 4a. (on face), registered to London, marked "Cabul field force" and "via Brindisi Stamped and Registered", all cancelled with "F. NO 12" in bars and showing, alongside the adhesives on reverse, boxed "REGISTERED/FIELD. P.O. NO 12/N. W. ", "FIELD P.O./NO 12" c.d.s. and Kohat transit c.d.s.; the envelope opened-out to reveal a remarkable exhibition item. Photo