Coin ConditionĬoins may be advertised as circulated or uncirculated. A number of the coins have been produced in colour for an even more special finish. The design is a lovely close-up of that beloved face, with clearly visible whisker details and his bushy tail in all its glory before his encounter with Old Brown. This captivating character is showcased on the series of Squirrel Nutkin 50p coins, designed by Emma Noble. The mischievous Squirrel Nutkin is one of the most popular. To celebrate the 150th anniversary of the birth of one of Britain's best-loved authors, Beatrix Potter, the Royal Mint launched a collection of commemorative coins featuring her storybook characters.