Auction 333-341 Nigeria, Cameroon, Sudan & Worldwide Postal History - Day 4

Large Camel 1906: 5 m. carmine Official envelope, overprinted "O.S.G.S" in black (13½ mm. no dot after S), cancelled at Omdurman, dated 19 January 1904, "OMDURMAN" bridge type circular datestamp and with pencil address locally. Has a faint vertical fold to the left well clear the imprint. Scarce. There are no recorded used examples. This being cancelled by favour and the address added later (H&G DB1). Comes with an unused example of the same type and also two unused Official 5 m. envelopes with overprint 17 mm. with stop after 'S', one which has a faint double overprint (H&G DB1/DB1a). Useful group (4).