1931 (March 2-12), two First Flight covers Juba - Athens and Khartoum - London, franked by air post stamps, violet and black confirmation markings, arrival ds, mostly VF, Est. $200-$300 (Image)

1898, Camel Post, 1m-10p, complete set of eight, Rosette watermark, excellent condition, full OG, NH, VF and rare set in sound condition, C.v. $234, SG #10/17, £150 as hinged, Est. $200-$250 (Image)

1902-40, Camel Post, four complete issues, printed on watermarked Multiple Crescent and Multiple S G paper, the total is 34 stamps, full OG, NH (#29-35) or previously hinged, mostly VF, SG #18/46b, £270, Est. $150-$200 (Image)

1948, Camel Post, 1m-50p, complete set of 16, blocks of four, 3m with rounded bottom left corner, otherwise post office fresh, full OG, NH, VF, SG #96/111, C.v. £340++, Est. $200-$250 (Image)

1951, Camel Post, Animals and Scenes, 1m-50p, complete set of 17 in blocks of four, many with sheet margins, full OG, NH, VF, SG #123/39, C.v. £480++, Est. $200-$300 (Image)

Postage Due stamps. 1948-79, Gunboat ''Zefir'', 2m-20m, complete set of four on paper with watermark SG, in addition 10m and 20m re-issued in 1979 on Sudan Arms (Rhinoceros) watermarked paper, which are very scarce, full OG, NH, VF, Est. $200-$250 (Image)