GNF is the currency abbreviation for the Guinea franc, the national currency of the Republic of Guinea, a country in West Africa. The franc is subdivided into 100 centimes. The name "Guinea" comes from an ancient region in West Africa that was once known as "the Grain Coast".The first coins were issued by the French colonial administration in 1891. These were silver pieces worth 1/5 and 1/10 of a French franc. In 1945, copper-nickel coins were introduced worth 1 and 2 francs, with silver 5 and 10 francs added in 1952. In 1957, aluminium-bronze 20 and 50 centimes were issued, followed by brass 1 and 2 GNF coins in 1965. Cupro-nickel 3 GNF coins were introduced between 1982–83 but later withdrawn from circulation on 15 January 1991 due to their low purchasing power (1 cupro-nickel coin = about 0.7 US cents). However new issues have been made since 2005 with different denominations including: 25 & 50 Francs (2005), 10 & 25 Centimes (2008), 5 & 10 Dinars (2011)
And most recently a 200 Franc coin was minted commemorating 60 years of independence.