Bi-metallic coin dated 2006 (minted at Noida). Since 1996, Canada has also produced bi-metallic $2 coins (nicknamed "toonies"). Great Britain has issued a bi-metallic 2-pound coin since 1997; and Singapore has issued a bi-metallic 1-dollar coin since 2013. The first ever tri-metallic circulating coins were 20-francs coins introduced in France and Monaco in 1992. These were similar to the corresponding bi-metallic 10-francs coins, but had two rings instead of one. As well as circulating coins, where they are generally restricted to high-denomination coins, bi-metallic coins are often used in commemorative issues, often made of precious metals. For example, the only bi-metallic coin
New Zealand two-dollar coin New Zealand two-dollar coin The New Zealand two-dollar coin is the largest-denomination coin of the New Zealand dollar. It was introduced along with the one-dollar coin in 1990. Both are made from an alloy of aluminium and brass. It is the largest and heaviest coin in circulation, weighing ten grams and measuring 26.5 millimetres in diameter. Its thickness is 2.7 mm, only 0.4 mm thinner than the one-dollar coin, thus it is the second-thickest coin in the country's circulation. A two dollar banknote was used in New Zealand from the start of the dollar in 1967 until 1991 when the