Decimal Day weights and measures.) Around the time of Decimalisation Day, "Decimal Adders" and other converters were available to help people convert between the old and new coins. The following is a table showing conversions between the decimal and pre-decimal systems. All pre-decimal coins (except for certain non-circulating coins such as crowns, sovereigns, and double florins which were explicitly excluded from demonetisation) are now no longer legal tender. Public outcry at the proposed demise of the old sixpence (6d), worth exactly p and originally slated for early withdrawal, postponed its withdrawal until June 1980. Shillings and florins, together with their same-sized 5p
Twopence (British pre-decimal coin) Parys Mining Company on Anglesey issued huge numbers of tokens (although their acceptability was strictly limited). To alleviate this coin shortage, in 1797, the government authorised Matthew Boulton to strike copper pennies and twopences at his Soho Mint, in Birmingham. It was believed that the face value of a coin should correspond to the value of the material it was made from, so each coin was made from two pence worth of copper (2 ounces). This requirement means that the coins are significantly larger than the silver pennies minted previously. The large size of the coins, combined with the thick