 In 1982, copper-clad-steel replaced bronze in the 1 and 2 ngwee.These two were struck until 1983, with production of the 5 and 10 ngwee ceasing in 1987 and that of the 20 ngwee in 1988.Nickel-brass 1 kwacha coins were introduced in 1989 and depicted "Bank of Zambia" on the edges.