Rhodesia 1915 2½d Arms from Mount Selinda to USA

1915 MOUNT SELINDA via MELSETTER to USA: Envelope franked RHODESIA ovpt on 2½d Arms (SG 103) tied single circle cds 14 OC, additional strike alongside. On reverse the single circle transit cds OC 16 and the reverse showing also the printing of American Board Mission, Mount Silinda, Melsetter, S. Rhodesia.