centimos weighing 12.98 grams of 0.9 fine silver (fineness reduced to 0.835 in 1881) The dearth of pre-1857 copper coins were addressed by counterfeit two-cuarto coins (worth 1/80th of a peso) made by Igorot copper miners in the Cordilleras. In 1897 Spain brought over 1-peso silver coins as well as 5 and 10 centimos de peseta to be accepted by Filipinos as 1 and 2 centimos de peso. United States administration The United States also struck coins for use in the Philippines from 1903 to 1945. Denominations included the centavo, one centavo, five centavo, 10 centavo, 20 centavo, 50 centavo, and one peso. The and 1 centavo coins were struck in bronze, the 5 centavo struck in copper (75%) - nickel (25%), the 10, 20, 50 centavo and peso coins were struck in a silver composition. From 1903 to 1906, the silver coins had a silver content of 90%, while those struck after 1906 had a reduced silver content of 75% for 10 through 50 centavos and 80% for the peso. In both cases the silver was alloyed with copper. The obverse of these coins remained largely unchanged during the years 1903 to 1945. The centavo, one centavo, and five centavo coins depict a Filipino man kneeling against an anvil, with a hammer resting at his side. He is on the left side (foreground), while on the right side (background) there is a simmering volcano, Mt. Mayon, topped with smoke rings. This figure is an allegory for the hard work being done by the native peoples of the Philippines in building their own future. The obverse of the 10, 20, 50 centavo, and peso coins are similar, but they show the figure of Liberty, a standing female figure (considered by many to be the daughter of the designer 'Blanca') in the act of striking the anvil with a hammer. This was done to show the work being done by Americans in building a better Philippines. Liberty appears on the silver coins, instead of the base metal coins. The reverse of the coins comes in two varieties. The earliest coins were minted when the islands were a US Territory, and they bear the arms of the US Territories. This is a broad winged eagle, sitting atop a shield divided into two registers. The upper register has 13 stars, and the lower register has 13 vertical stripes. The date appears at the