1974 and 1979 Un Peso

[khpony]

I picked these up at a tot lot a couple of weeks ago. I don't have a metal test kit yet and was curious if either of them are silver. They appear as silver but I'm not sure.
Thanks!

 

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[Mackaydon]

Composition copper-nickel; series of 1970-1983 (Image of Jose Morelos y Pavon)
Don.......

 

[Arid-Zone-A-seeker]

Mexico dosn't want them back, either. But their fun anyway.