Brass 1 and 5 centavos were issued in 1943, and with copper nickel composition sporadically from 1915 to 1958. Beginning in 1915, 2, 5, 10, 20 and 40 centavos coins were occasionally minted. The last 10, 20, and 40 centavo coins were produced in 1952; these were commemorative issues celebrating the fiftieth year of the republic. As mentioned above, in 1953, silver 25 and 50 centavos commemorative coins were also issued. These were the last silver coins issued for circulation. The last US produced coin was the 1961 five centavo piece.