showing, on reverse, "BASE OFFICE" (19/1), "FIELD P.O. NO 86" (21/1) (very rare) and "GANTOK" (22/1) single ring d.s., a few cover faults. One of the earliest recorded examples of the F.P.O. handstamp" /> cover 1903 (31 Dec.) linen envelope from Edinburgh bearing 1a. (4) to<I> "F.M. Bailey, 32 Pioneers, Tibet Frontier, Commission, Gantok"</I> showing, on reverse, "BASE OFFICE" (19/1), "FIELD P.O. N<V>O 86" (21/1) (very rare) and "GANTOK" (22/1) single ring d.s., a few cover faults. One of the earliest recorded examples of the F.P.O. handstamp | Christie's