1d vermilion on buff QV postal stationery card with 'BRITISH PROTECTORATE OIL RIVERS' overprint in black (H&G 2) datelined 'Opobo W.C.A. 19th July 1893' on reverse with large 'S.S MANDINGO' ship marking in violet alongside used with fine strike of OPOBO RIVER cds in black dated JY 20 1893. Addressed to UK with LIVERPOOL PACKET cds in red on front. A fine & scarce commercial use.