O 44/AP 30/03" single-ring d.s. (Galkayu), on reverse a good strike of the "BASE OFFICE/OBBIA" (14/5) single-ring d.s. A very fine cover from this rare Office. Photo" /> cover 1903 (30 Apr.) 1a. on 2a. 6p. envelope via Aden to London, cancelled by a very good strike of the "F.P.O. N<V>O 44/AP 30/03" single-ring d.s. (Galkayu), on reverse a good strike of the "BASE OFFICE/OBBIA" (14/5) single-ring d.s. A very fine cover from this rare Office. Photo | Christie's