The one dollar coin was first issued in 1866 as a silver coin of 38 mm, 26.96 grams and 2.80mm thick. This issue lasted only three years with a reported mintage of 2,109,000 coins for all years, separate statistics of each years mintage are unavailable. The second issue was started in 1960 as a copper-nickel coin of 30 mm in diameter, 2.25 mm thick and weighing 11.66 g. The circulation of this coin was ended in 1978 with the issuance of a smaller coin of 25.50 mm in diameter, 1.95 mm thickness and weighing 7.10 g.