Hello , Recently i obtained 2 Mexican coins and I hope you could answer my following questions; -1977 100 pesos coin what material does the coin made of? and what's the value of the coin? -1954 20 centavos coin as you can see here the coin is very dirty and has patina spots on it how can i clean the patina and the black stuff the coin's cover in ? PS lemon juice didn't helped. Thanks.
Your 1977 100 Pesos is 72% silver - its "melt" value is about $15 as of today. The numismatic premium this issue commands is nominal. Are you certain your other coin isn't a 20 Centavos denomination? Don't clean either.
Yep, the bronze coin is a 20 Centavoes, here is a latter year coin. https://picasaweb.google.com/102169990131295314210/Mexico#5585494563013209698 https://picasaweb.google.com/102169990131295314210/Mexico#5585494574606851618
