Three Coins from Sri Lanka Country. ONE RUPEE - 1975, Metal: Copper-Nickel, Diameter: 25 mm, Layer: 2 mm, Weight: 7.1 g. FIFTY CENTS - 1972, Metal: Copper-Nickel, Diameter: 21 mm, Layer: 2 mm, Weight: 5.5 g. and TWENTY FIVE CENTS - 1978, Metal: Copper-Nickel, Diameter: 18 mm, Layer: 1.7 mm, Weight: 3.24 g. Republic of Sri Lanka. Quantity: Total 3 coins.