on British South Africa Company
In 1889 Britain established the British Central Africa Protectorate in the area that was to become Nyasaland to limit the expansion of Portuguese influence. Stamps of the British South Africa Company overprinted B.C.A. for British Central Africa were first used in North East Rhodesia and Nyasaland in 1891. They were superceded by stamps inscribed Nyasaland in 1908.