The Mexico City Mint
Estados Unidos Mexicanos Period.
The reduction of the coins in size and metal content.
(1905 to Present)
As the price of silver fluctuates, coins are accepted, rejected or hoarded. If the value of the silver content is more than its commecial value the coin is hoarded. If the value of the silver content is less than its commercial value the coin is rejected. And if the value of the silver content is equal to its commercial value the coin is accepted. The purpose of the reform act of 1905 was to replace silver as a standard of value. The 5 ¢ silver coin was replaced with a nickle coin, The silver coins were reduced in both weight and fineness. The silver content went from 0.9027 to 0.800 in 1918 and the to 0.720 from 1920 to 1945. After that the 10¢, and 20¢ coins were made of copper and the silver content, in the silver coins, went to 0.400 in 1947, 0.300 in 1950, 0.100 1957 and by 1970 the peso was made of a copper-nickel alloy. Something similar happened in the USA, until 1963 the silver coins were 0.900 silver and in 1964, the coins were silver clad and by 1971 the were copper-nickle clad as they are today.Coins of this period