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

British Protectorate Oil Rivers 1892: Registration Envelope, 2 d. ultramarine, size H2, used with 1892 2½ d. purple & blue, overprinted "BRITISH PROTECTORATE / OIL RIVERS", sent from Brass to Lagos, dated 13 February 1893, tied by "BRASS RIVER" cds in black with additional strike alongside, endorsed "Per S.S. Benin", arrival datestamp on reverse dated 21 February 1893. Has three vertical filing creases well clear of adhesive, otherwise fine. Rare; one of four recorded used examples.