and copper-plated zinc in 1985. In 1989, cupro-nickel 50 cent and 1 dollar coins were issued for circulation, although they did not replace the corresponding banknotes. The now-obsolete 1 cent coin is about the size of a US dime, and the 5 and 25 cent coins are about the same size as their US counterparts but with different metal compositions. The 15 cent coins are still produced by the Central Bank. All coins now bear the Bahamian Coat of Arms on one side with the words "Commonwealth of The Bahamas" and the date. The reverses of the coins show objects from Bahamian culture with the value of the coins in words. The 1 cent has three starfish, the 5 cent a pineapple, the 10 cent two bonefish, the 15 cent a hibiscus, and the 25 cent a native sloop. The 1 cent was demonetised at the end of 2020. All cash transactions in the Bahamas are now rounded to the nearest five cents. Banknotes In 1966, the government introduced notes in denominations of , 1, 3, 5, 10, 20, 50 and 100 dollars. The Bahamas Monetary Authority took over the issuance of paper money in 1968, issuing the same denominations. The Central Bank of the Bahamas was established on 1 June 1974 and took over note issuance from that point forward. Its first issue of notes did not include the and 3 dollar denominations but these were reintroduced in 1984. The dollar has undergone several revisions in the last twenty years, one of the more notable being an extremely colourful redesign in celebration of the quincentennial of the landing of Christopher Columbus on a Bahamian island he named San Salvador. All banknotes other than the fifty cent note have been undergoing design changes to foil forgery in recent years, although the notes implemented more stringent security long before the US's recent redesign of their notes. All banknotes are the same physical size, like the US dollar but unlike the euro. The latest counterfeit-proof formula is the "Counterfeit Resistant Integrated Security Product", or CRISP. The new banknote was released on 5 August 2005, while the banknote was released on 6 September 2006. In October 2005, someone counterfeited one of the new CRISP bills, serial number A161315. Bahamian authorities warned merchants to look for banknotes that lacked the distinctive watermark. Until 1992, all notes displayed a portrait of Queen Elizabeth II (Head