Florin (British coin) angles. The new florin closely resembles the Gothic crown of 1847; the obverse for both was designed by the Chief Engraver of the Royal Mint, William Wyon, while the reverse of both was designed by William Dyce. Unlike the crown's Gothic script, the 1849 florin has Roman lettering. The 1849 florin, issued in silver, weighed 11.3 grams and had a diameter of 28 millimetres. The new coin made clear its value with the inscription on the reverse. To aid in the decimal experiment, the half crown (two shillings and sixpence, or one-eighth of a pound), near to the florin in
One pound (British coin) a new 12-sided design, was introduced in 2017, the earliest dated as 2016. The coin has a 12-edged shape, similar to the pre-decimal brass threepence coin; it has roughly the same size as the previous £1 coin, and is bi-metallic like most £2 coins. The new design is intended to make counterfeiting more difficult, and also has an undisclosed hidden security feature called "iSIS" (Integrated Secure Identification Systems), thought to be a code embedded in the top layer of metal on the obverse of the coin, visible only under a specific wavelength of ultraviolet light. Current two-pound coins, being bi-metallic