it." Sovereigns of George III. Motto of the Order of the Garter. . "A decoration and protection." Some pound coins of Elizabeth II of the United Kingdom and some crown coins including some of Victoria and George V. Refers to the inscribed edge as a protection against the clipping of precious metal, as well as being a complimentary reference to the monarch and the monarchy. Minting errors reaching circulation Coins with errors in the minting process that reach circulation are often seen as valuable items by coin collectors. In 1983, the Royal Mint mistakenly produced some two pence pieces with the old wording "New Pence" on the reverse (tails) side, when the design had been changed from 1982 to "Two Pence". In 2016, a batch of double-dated £1 coins was released into circulation. These coins had the main date on the obverse stating '2017', but the micro-engraving having '2016' on it. it is not known how many exist and are in circulation, but the amount is fewer than half a million. In June 2009, the Royal Mint estimated that between 50,000 and 200,000 dateless 20 pence coins had entered circulation, the first undated British coin to enter circulation in more than 300 years. It resulted from the accidental combination of old and new face tooling in a production batch, creating what is known as a mule, following the 2008 redesign which moved the date from the reverse (tails) to the obverse (heads) side. See also Banknotes of the pound sterling List of British banknotes and coins Mark (money) Non-decimal currency One hundred pounds (British coin) Roman currency Twenty pounds (British coin) References External links Clayton, Tony: Coins of England and Great Britain Chard, Juliana: Common Names of British Coin Denominations UK Coin Designs and Specifications from the Royal Mint's website Coin Designs — Royal Mint competition designs United Kingdom: Coins Issued and Used – list of all UK coins, with photos and descriptions Old Money Converter – converts £sd to decimal currency Old Money Converter 2 – converts decimal currency to £sd Currencies of British Overseas Territories Currencies of the Crown Dependencies Currencies of the United Kingdom Pre-decimalisation coins of the United Kingdom