with ms "10" (as.) charge notation, showing on reverse a good strike of the rare "FIELD FORCE POST OFFICE/ABYSSINIA/6 AP/68/F.F." duplex together with "FIELD FORCE POST OFFICE/ABYSSINIA/9 AP/68" c.d.s. An interesting and unusual item for this Expedition. Photo" /> cover 1868 (31 Mar.) unfranked envelope (with accompanying letter) headed<I> "Officers Letter No Stamps Procurable"</I> with ms<I> "10"</I> (as.) charge notation, showing on reverse a good strike of the rare "FIELD FORCE POST OFFICE/ABYSSINIA/6 AP/68/F.F." duplex together with "FIELD FORCE POST OFFICE/ABYSSINIA/9 AP/68" c.d.s. An interesting and unusual item for this Expedition. Photo | Christie's