This Sovereign was struck at the Melbourne branch of The Royal Mint and has a distinctive M mint mark to denote this. In 1931, Sovereigns were struck at three of the Branch Mints in Melbourne, Perth and South Africa. Out of these three branches, the Melbourne Sovereign has by far the lowest mintage with only 57,779 struck, compared to 1,173,568 in Perth and 8,680,594 in South Africa.