Thomas Wyon Snr. a die-engraver went into partnership with his brother Peter, as die-sinkers in Lionel Street, Birmingham in about 1796. They engraved a large number of dies for British tradesmen's tokens, especially part of the Coventry series of buildings.
In 1800, Thomas decided that there was not enough work for both brothers in Birmingham and elected to move to London. He carried on the business in London with such success that he was called upon by the Royal Mint in the work of the new coinage of 1816, being given accommodation within the mint for three months.
His work was so successful that he was appointed Chief Engraver of His Majesty's Seals in September 1816.