The pound was the currency of the British Solomon Islands Protectorate between 1899 and 1966. It was divided into 20 shillings, each of 12 pence. Initially, the British pound circulated, supplemented by local banknotes from 1916. In 1920, Australian coins and banknotes were introduced, although local paper money continued to be produced until 1932. When the Australian pound broke its parity to the pound sterling in 1930 during the great depression, this caused uncertainty in the British territories of the Western Pacific regarding whether their pound unit was a pound sterling or an Australian pound. This uncertainty prevailed into the mid-1930s and was only resolved when the matter was clarified by King's regulations. The final result was that all the British territories apart from Fiji adopted the Australian unit. As such, the British Solomon Islands Protectorate followed the course of Australia.
(The end result was that Fiji had a distinct pound of its own that differed in value from the pound sterling as well as from the Australian and New Zealand units. New Zealand was nearly at par with Australia, and all New Zealand controlled territories, notably Western Samoa, adopted the New Zealand unit which was later returned to parity with sterling in 1948. Papua New Guinea, the British Solomon Islands Protectorate, the Gilbert and Ellice Islands, the New Hebrides (as regards their sterling accounts), Tonga and Nauru all followed the Australian unit.)