Mexico.. 100 Pesos https://en.numista.com/catalogue/pieces961.html Un peso https://en.numista.com/catalogue/pieces1105.html
Hi Mayela, Welcome to Coin Talk !! where all coins are worth a comment, no matter how demonetized they are. Demonetized simply means that the issuing country, in this case Mexico, no longer considers them as money and won't allow them to be used as money in daily commerce. That doesn't mean you won't/can't find them around. The Swiss 5 Francs has also been demonetized for certain years. It was made out of Silver until 1969 , but be careful because in 1968 and 1969 , they made both Silver and Copper-Nickel coins. My suggestion is to look for similar coins that are made out of Silver. Silver coins will have value. Also remember that condition of a coin is very, very important. The condition of the 5 coins you posted would probably be described as just average. In my estimation, Mexico has a very large variety of Silver coins to look for. Mexico has been making silver coins for hundreds of years. My personal collection includes hundreds of Silver coins from Mexico. Some of the easiest to find for sale and also some of the least expensive to buy, are the 1957 - 1967 Un Peso coins. They're large and kinda heavy even though they're only 10% Silver. Another one I like is the 1977 and 1978 Cien Pesos coin which is 72% Silver. Also the 1968 Olympics coin which is 25 Pesos and also 72% Silver. Going further back, almost any coin larger than 25 Centavos and made before the mid 1950's is going to be silver. Now those dates and numbers are not perfect. There's some leeway there as to when and who and how much, but anytime you want to find out about a coin, use the link that paddy man gave you. You can look up any coin at numista.com and also at ngccoins.com . As you do more, you'll learn more, which will make everything more fun and rewarding. Please don't forget that we will always be here for you to post photos and ask questions so we can help you understand what you have. Thanks for posting Mayela !!
All 1968s are copper-nickel, all 1969s are silver. To be fair, the face value of the copper-nickel ones isn't a whole lot lower than the melt value of the silver ones.
Face value? I think they remonetized the new peso to be worth 1000 of the old pesos around 1993. So the face value of anything before that would be next to nothing if they were still accepted as currency.