Subsequently, there were only two major changes to Australia’s international parities until the 1970s: the first, in 1949, when Australia followed a sterling devaluation against gold and the US dollar, and the second, in 1967, when sterling was further devalued, but Australia did not follow.
Thus, Australia’s exchange rate against sterling remained unchanged from 1931 to 1967, while the rate against the US dollar -- which is more important for current purposes -- was unchanged from 1949 to 1971.