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

British Protectorate Oil Rivers 1892: Registration Envelope, 2 d. ultramarine, size G, used with 1892 ½ d. vermilion horizontal pair, 1 d. lilac two singles and 2 d. grey-green and carmine, overprinted "BRITISH PROTECTORATE / OIL RIVERS", sent from Old Calabar to Tranmere, England, tied by "OLD CALABAR RIVER" cds, with a "REGISTERED LIVERPOOL" oval dated 3 December 1893. To the reverse a "BIRKENHEAD" cds dated 4 December 1893. Two surface rubs to back, otherwise fine and attractive.