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
Zimbabwean dollar such as productivity in key sectors, have been achieved. In 1980, coins were introduced in denominations of 1, 5, 10, 20, 50 cents, and 1 dollar. The 1 cent coin was struck in bronze, with the others struck in cupro-nickel. In 1989, bronze-plated steel replaced bronze. A 2 dollar coin was introduced in 1997. In 2001, nickel-plated steel replaced cupro-nickel in the 10, 20 and 50 cents and 1 dollar coins, and a bimetallic 5 dollar coin was introduced. The Reserve Bank of Zimbabwe announced plans for new Z$5,000 and Z$10,000 coins in June 2005, although these were never actually