1931 Proof Sovereign struck at the Perth Mint, a numismatic commemoration of Australia's move off the gold standard
This Proof 1931 Sovereign is a celebration of the Perth Mint’s achievements in crafting perfection in gold. If quality is the prime consideration, then this coin is unique, for the only other known example is impaired.
This Proof 1931 Sovereign represents the very best in its class.
This Proof 1931 Sovereign, struck at the Perth Mint, is a numismatic giant.
There are key factors that influence coin values. Understanding those factors is essential to understanding why this coin is so highly valued. It's no different to real estate and appreciating why median values of suburbs such as Toorak in Melbourne, Point Piper in Sydney, Teneriffe in Brisbane and Peppermint Grove in Perth are the highest in their respective cities.
Values of Australian proof gold are shaped by a mix of date (and the historical significance of the date), exclusivity of the sector, the rarity of the coin (generally, 1, 2 or 3), the coin's quality. And its provenance. No single factor works on its own. It is the interaction of these factors that shape values.
Now let's evaluate the 1931 Proof Sovereign using the criteria mapped out above.
Date
The date 1931 is historically significant for it was the year Australia went off the gold standard and ceased using gold coins as currency. The date signifies the end of an era and ensures that the coin will always be relevant.
Exclusivity
The Perth Mint had a miserly approach to striking proof coinage. Between 1899, when the mint opened and 1931 when the last sovereign was struck, proof coinage was only produced in three years
The Perth Mint had a miserly approach to striking proof coinage. Between 1899, when the mint opened and 1931 when the last sovereign was struck, proof coinage was only produced in three years. In the year of its opening, 1899. In Australia's Federation year, 1901. Both years of the Veiled Head era. And the final year of Australian gold sovereign production, 1931, when Australia ceased striking gold coins as currency (George V era). Three years that offer a total buying pool of seven coins. Conversely the Melbourne Mint struck proofs in xx years out of its xx years of operation and the Sydney Mint xx out of xx.
There are two known examples of the Perth Mint Proof 1931 Sovereign. But if quality is a prime consideration, then this coin is unique, for the other known coin is impaired with imperfections in the fields. This coin is a gem proof, and a superb FDC.
The provenance of this coin is supremely fitting. It was presented to John Agnew circa 1931. That a coin of such power and influence in the Australian gold coin market was originally owned by John Agnew somehow seems just right for he too was powerful and influential. A man of vision and remarkable knowledge of gold mining, Agnew was credited with making a major contribution to revitalise the Western Australian gold mining sector in the 1920s and 1930s and was Director of Consolidated Goldfields when he was gifted this coin.
1931 Proof Sovereign
Perth Mint Coin of Record
1931 Proof Sovereign
Perth Mint Coin of Record
This Perth Mint Proof 1931 Sovereign is a numismatic giant. It was presented to John Agnew circa 1931. That a coin of such power and influence in the Australian gold coin market was originally owned by John Agnew somehow seems just right for he too was powerful and influential. A man of vision and remarkable knowledge of gold mining, Agnew was credited with making a major contribution to revitalise the Western Australian gold mining sector in the 1920s and 1930s and was Director of Consolidated Goldfields when he was gifted this coin.
Offered at Baldwins, London in 2012, as lot 878, the coin sold for £52,800, 32 per cent higher than its pre-sale upper estimate of £40,000. By comparison, a 1929 Melbourne Mint Proof Sovereign, a proof coin out of the same era, was offered with an upper pre-sale estimate of £40,000 and sold for £40,800.
There is no doubt that the year 1931 is considered more important historically than the 1929. But, the prime reason for the vast price differential however is that the 1931 Proof Sovereign was struck at the Perth Mint. And is overwhelmingly rare and prestigious.
Australia's Gold Proof Coinage
When the Royal Mint London or the British Museum requested a sovereign or half sovereign from an Australian Mint, they were never sent a circulation strike. Nor would a circulation strike be presented to the monarch, gifted to a dignitary or sent to an influential collector. And a circulation strike would not be displayed at a Colonial Exhibition.
An individually crafted presentation piece would be specially created for the occasion, minted to a proof or specimen finish. The technical term for such a piece is 'Coin of Record'.
A Coin of Record is an artistic interpretation of coinage, a strikingly beautiful coin beyond ordinary currency. Individually crafted to standards far exceeding that required of a circulating coin, using special coining techniques. Whereas production of circulating coinage was dictated by Government, Coins of Record were struck at the discretion of the mint master.
Coins of Record were not produced every year and, as they were individually crafted, the process was time consuming and the mintages minuscule. For gold proofs, generally ten pieces or less. There were several occasions when only a single coin was struck.
Coins of Record of Australia's sovereigns and half sovereigns are visually stunning, distinguished by brilliant golden-mirror surfaces. And it is their beauty and their ultra-exclusivity that drives demand.
Australian gold proof coins moved onto the international stage when the collection of John G. Murdoch was liquidated via Sotheby, Wilkinson & Hodge in London in 1903, following his passing in 1902. Murdoch held an extensive collection of gold proofs, including coins from the Sydney Mint, Young Head, Veiled and Jubilee eras.
The reputation of Australia's gold proof sovereigns and half sovereigns as an international commodity was set in stone in 1903, a widespread regard that holds to this very day, right across the globe. Recent international auction results (February 2026) confirm the status of Australia's gold proof coins as a globally traded commodity. It is noted that the frosted proofs of the Melbourne Mint (such as the 1894s) are keenly sought by American collectors.
Coin of Record is an artistic interpretation of coinage, a strikingly beautiful coin beyond ordinary currency, individually crafted to standards far exceeding that required of a circulating coin.
Using technical terms, Coins of Record were struck using special minting techniques to either a proof or specimen finish involving highly polished blanks to create mirror fields and carefully prepared dies to ensure a wealth of design definition.
A Coin of Record is a showpiece. The crown jewels of coinage, adding glamour and exceptionality to any collection.
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