An extremely rare £1 coin dating back to the start of English Civil War is expected to fetch £50,000 at auction . The solid silver 1643 Declaration Pound was struck in Oxford , which was Charles I 's seat of power after he withdrew from London . Charles was beheaded just six years after the coin was created , but an inscription on the back declares the King 's belief that he could not be toppled . An extremely rare £1 coin from the start of English Civil War is expected to fetch £50,000 at auction . The coin was made as the a new mint was set up in the city and was created to launch an official currency for parts of the country under the King 's command . The legend on the back of the coin translates as 'Let God arise and let His enemies be scattered ' , symbolising the King 's belief in the 'absolute monarch ' . The words were a declaration of the King 's power , but this belief in an almighty monarchy caused some of the tensions which led to the Civil War between the Royalist Cavaliers and the Parliamentarian Roundheads . The large coin , which is more two inches across and remains in good condition , was passed down through one family for generations but the current owner did not realise its value . Timothy Medhurst , a coin specialist and auctioneer at Duke 's Auctioneers in Dorchester , Dorset , where the coin will be sold , said it was the type of item he dreams of finding . 'This coin marked Charles I 's attempts to regain his failing power and it represents a pivotal moment in the history of the British Isles , ' he said . Charles I was beheaded just six years after the coin was created , but an inscription on the back declares the King 's belief that he could not be toppled . 'It is a coin which is rare to find and it will cause a stir in the coin collecting world . 'The value of coins from this period are at an all-time high , and it will be highly sought after . 'The coin has been handed down through several generations to the current owner , who had no idea of its value and is as excited about the auction as I am . 'It is fair to say that 1643 was a crucial year in the history of the Civil War and it is fascinating to think that this coin was produced by hand , in silver , at such a tumultuous time . 'It was only six years after this coin was struck that Charles I was beheaded and labelled as `` tyrant , traitor , murderer and public enemy '' by the 59 judges who found him guilty of high treason . ' The English Civil War ( 1642-1651 ) was a series of armed conflicts and political machinations between the Roundheads and Cavaliers in the Kingdom of England . It led to Charles I being beheaded and his son being exiled in 1649 as the monarchy was replaced by a protectorate , led by Oliver Cromwell . After Cromwell 's death , his son Richard was unable to maintain the confidence of the New Model Army , causing the protectorate to fall and the monarchy to be restored with Charles II on the throne in 1660 . The sale takes place on March 12 .
Rare English Civil War era coin could fetch up to £50,000 at auction . 1643 Declaration Pound made just 6 years before Charles I was beheaded . But inscription on back contains King 's belief that he could not be toppled . Coin was passed down through a family but owner did not realise its value .