A ‘piedfort’ coin’ is a special type of Proof coin. Proof coins are struck in platinum, gold, silver and base metal editions. Each Proof die may only strike a few hundred coins before it has to be repolished. Proof dies are also regularly reworked to maintain the quality of the finish. The dies are cleaned with air between each coin to ensure that no marks or imperfections are caused during striking.Īs a result of this extra care and attention, no more than 50 Proof coins can be struck within an hour. Blanks are fed into the coin press by hand before being struck up to six times, at a lower speed and with less pressure than other finishes, to preserve the finer details of the design.Īfter striking, each coin is inspected for imperfections. The dies used to strike Proof coins are hand-finished to ensure that all imperfections are removed. Their sharpness, detail and finish are unrivalled, making them perfect for collectors looking for highest levels of craftsmanship and detail. Proof coins are the highest quality commemorative coins. If you’ve heard these terms being used but are unsure what they mean, read on to find out more about the difference between these coins. As well as the circulating coins you find in your change, The Royal Mint strikes coins to three different standards for both investors and collectors: Proof, Brilliant Uncirculated and Bullion. A Coin Collector’s Guide to Striking StandardsĪs an aspiring coin collector, it’s important to acquaint yourself with the different standards to which coins are struck, as this will affect their price and subsequent value.
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