| Lot Number: 403 | |
 | Date: 1926, Jan 15 Est. price: £275.00 Category: Sudan Description: Return of RAF test flight from Khartoum to Abu Suwer, 17 Jan 1926 arrival hs on front, signed by pilot V.C.Stonar, plain cover, violet three line "By Return of/Special Flight/Cairo to Khartoum" and violet "Khartoum 15/1/25" hs's. This flight was undertaken by RAF Squadron No. 47 as a test of the Fairey IIID aircraft equipped with the Napier Lion engine, and as a prelude to the Cairo-Cape Town flight planned for later in the year. Little is known about this flight, and only 35 covers were carried on the return flight. A 200 word account by Bill Coley can be found in Air Mail News, No 158, p129. |
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| Lot Number: 404 | |
 | Date: 1931, Mar 2 Est. price: £15.00 Category: Sudan Description: F/F Khartoum to Mwanza, b/s 10/3, flown on first England-East Africa service, violet "Khartoum to Mwanza" cachet, Imperial Airways, blue/white "Map" envelope, IAW. |
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| Lot Number: 405 | |
 | Date: 1931, Mar 5 Est. price: £15.00 Category: Sudan Description: Imperial Airways, Wadi Halfa to Khartoum, bs 7/3, and on to Keirema bs, flown on inaugural England-East Africa service, plain airmail ettiquette cover franked 2P 7ml. |
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| Lot Number: 406 | |
 | Date: 1931, Mar 5 Est. price: £15.00 Category: Sudan Description: Imperial Airways, Wadi Halfa to Kisumu bs 10/3, flown on the inaugural England-East Africa service, blue/white souvenir 'map' cover franked 2P 10ml. Francis Field authentication hs verso. |
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| Lot Number: 407 | |
 | Date: 1931, Mar 5 Est. price: £15.00 Category: Sudan Description: Imperial Airways, Wadi Halfa to Mwanza bs 10/3, flown on the inaugural England-East Africa service, blue/white souvenir 'map' cover franked 2P 10ml. |
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| Lot Number: 408 | |
 | Date: 1931, Mar 5 Est. price: £12.00 Category: Sudan Description: Imperial Airways, Wadi Halfa to Mwanza first flight cachet, but dropped off at Khartoum, bs 7/3, and on to Omdurman, bs 7/3, flown on inaugural England-East Africa service, plain airmail etiquette cover franked 2P 7ml. |
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| Lot Number: 409 | |
 | Date: 1931, Mar 7 Est. price: £25.00 Category: Sudan Description: F/F Malakal to Mwanza, bs 10/3, carried on inaugural London to East Africa service, violet biplane cachet, blue map cover, Imperial Airways |
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| Lot Number: 410 | |
 | Date: 1931, Mar 7 Est. price: £12.00 Category: Sudan Description: Imperial Airways East Africa service, F/F Khartoum to Nairobi, bs 11/3, via Kisumu, 10/3, violet "First Flight/Khartoum-London" biplane F/F cachet, plain cover, franked 2M 10 opt. Small closed nich rh edge, see scan, |
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| Lot Number: 411 | |
 | Date: 1931, Mar 12 Est. price: £12.00 Category: Sudan Description: Cover flown WadI Halfa to Mwanza 16/3, on F/F Croydon/Mwanza, b/s, official map cover franked 2P 10ml, 'First Flight/Halfa to Mwanza' biplane cachet, Imperial Airways, |
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| Lot Number: 412 | |
 | Date: 1931, Dec 12 Est. price: £35.00 Category: Sudan Description: Khartoum to Broken Hill, bs 19/12, flown on the Christmas flight to Cape Town, black Khartoum to Cape Town cachet, plain cover, Imperial Airways. |
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