Financial and political advantages of the sterling bloc have kept Strijdom in the Commonwealth until now.
From the time.com
Barbados and other sterling bloc territories in the British West Indies converted in 1955, South Africa in 1961.
From the time.com
By midyear, British reserves had shrunk to $2.7 billion, less than half the amount of pounds held by individuals and central banks in the sterling bloc alone.
From the time.com
When the United Kingdom abandoned the gold standard in 1931, the British Honduras dollar continued with its attachment to the US dollar unit, and as such it did not become part of the sterling bloc.