 In 1920, the size of the 1¢ was reduced and the silver fineness of the 5¢, 10¢, 25¢ and 50¢ coins was reduced to 0.800 silver/.200 copper.This composition was maintained for the 10¢, 25¢ and 50¢ piece through 1966, but the debasement of the 5¢ piece continued in 1922 with the silver 5¢ being entirely replaced by a larger nickel coin.In 1942, as a wartime measure, nickel was replaced by tombac in the 5¢ coin, which was changed in shape from round to dodecagonal.