One pound coin

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The one pound coin (£1) is a denomination of modern British coinage that is worth one pound sterling: it is commonly known simply as a pound coin. Since 2024, its obverse has featured the profile of Charles III and bears the Latin engraving CHARLES III D G REX (Dei Gratia Rex) F D (Fidei defensor), which means 'Charles III, by the grace of God, King, Defender of the Faith'. The original, round £1 coin was introduced in 1983. It replaced the Bank of England £1 note, which ceased to be issued at the end of 1984 and was removed from circulation on 11 March 1988, though still redeemable at the bank's offices, like all English banknotes. One-pound notes continue to be issued in Jersey, Guernsey and the Isle of Man, and by the Royal Bank of Scotland, but the pound coin is much more widely used. A new, dodecagonal (12-sided) design of coin was introduced on 28 March 2017 and both new and old versions of the one pound coin circulated together until the older design was withdrawn from circulation on 15 October 2017. After that date, the older coin could only be redeemed at banks, although some retailers announced they would continue to accept it for a limited time, and it remained in use in the Isle of Man. The main purpose of redesigning the coin was to combat counterfeiting. As of March 2014 there were an estimated 1,553 million of the original nickel-brass coins in circulation, of which the Royal Mint estimated in 2014 that just over 3% were counterfeit. The new coin, in contrast, is bimetallic like the current £2 coin, and features an undisclosed hidden security feature called "iSIS" (Integrated Secure Identification Systems). The current 12-sided pound coins are legal tender to any amount when offered...