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
Farthing (Irish coin) Farthing (Irish coin) The farthing (d) () was the lowest value coin of the pre-decimal Irish pound, worth a quarter of a penny, of a shilling or of a pound. The coin had lost much of its value through inflation long before decimalisation in 1971, and during the 1960s no farthings were produced for general circulation; those minted in 1966 were produced for collectors' sets. The coins officially measured in diameter and weighed 2.83495 grams. The bronze coin is (was) made up of 95.5% copper, 3% tin and 1.5% zinc. It was introduced in 1928 to replace the British farthing