Upper coins: Silver .300 25 centavos 1950-1953
https://en.numista.com/catalogue/pieces972.html
Down Coins: Silver .720 20 centavos 1943
https://en.numista.com/catalogue/pieces5566.html
Silver .100 1 peso 1958 and 1962
https://en.numista.com/catalogue/pieces3550.html
I'm actually looking for South American coins (Preferably Venezuela, Guatemala Colombia) and not only silver, but all coins in circulation. I have lots of Mexican coins for exchange, even some commemoratives if you are interested. PM or comment :)
Emiliano