I have run across this Mexica (I think) coin. Its silver in color with the same information on the obverse and reverse (as pictured). It's about 16.2 mm and weighs 1.6g. It bears the date 1921. I've found a coin in the Standard catalog that is gold 2 1/2 pesos KM# 463 that has the same obverse, but a different reverse. I'm wondering if this is a fake, counterfeit, or a joke. If anyone has any ideas, I'd be greatly appreciative.
