(uncancelled) from S. Sergt. McNicholl, Ordnance Dept. via Aden to Bombay, additionally bearing ½a. cancelled by "SAWAKIN" bridge c.d.s., both values show a manuscript "O" underneath indicating that the form of the prepayment was invalid, thus the circular "OVERLAND POSTAGE/DUE/A/5" handstamp. Very fine and unusual. Photo " /> <I> "Soldiers' and Seamen's Envelope"</I> (uncancelled) from S. Sergt. McNicholl, Ordnance Dept. via Aden to Bombay, additionally bearing ½a. cancelled by "SAWAKIN" bridge c.d.s., both values show a manuscript "O" underneath indicating that the form of the prepayment was invalid, thus the circular "OVERLAND POSTAGE/DUE/A/5" handstamp. Very fine and unusual. Photo | Christie's