1930-32 first flight covers (5) from 1930 Government first flight Tanga - Dar-Es-Salaam (about 50 flown), 1931 Govt Experimental flight Dar-Es-Salaam - Mombassa (2 similar covers) - about 50 flown, registered on to London by sea. 1932 Feb 2nd Imperial Airways emergency flight Broken Hill - Nairobi springbok cover flown Moshi - Nairobi, 1932 Imperial Airways Moshi - Athens springbok cacheted cover (50 flown). (Image)