LONDON-EAST AFRICA 1ST FLIGHT 1931 Sudan-Mwanza, 10mils Air & 2p Air (SG48-49) of Sudan tied with Malakal 7 3 31 cds cancel. First Flight Malakal to Mwanza cachet, on map of Africa illust cover. On reverse Mwanza 10 Mar 31 receiving. {C} [US4] (Start Price / Minimum Bid) = £20.80)