Nigerian coins from the colonial era until now, popularly known as "kobo" In 1973, coins were introduced in denominations of ½, 1, 5, 10 and 25 kobo, with the ½ and 1 kobo in bronze and the higher denominations in cupro-nickel. The ½ kobo coins were minted only that year. In 1991, smaller 1, 10 and 25 kobo coins were issued in copper-plated-steel, along with nickel-plated-steel 50 kobo and 1 naira. On 28 February 2007, new coins were issued in denominations of 50 kobo, 1 and 2 naira, with the 1 and 2 naira bimetallic. Some Nigerians expressed concerns over the usability of the ₦2 coin.[5] The deadline for exchanging the old currency was set at 31 May 2007. The central bank stated that the ½ to 25 kobo coins were withdrawn from circulation with effect from 28 February 2007.
½ kobo 1 kobo 5 kobo 10 kobo 25 kobo 50 kobo 1 naira. 2 naira
Banknotes
On January 1, 1973, the Central Bank.
