(20) 1968 MEXICO OLYMPICS (72% PURE SILVER) 25 Pesos COINS. The item "(20) 1968 MEXICO OLYMPICS (72% PURE SILVER) 25 Pesos COINS" is in sale since Friday, February 19, 2021. This item is in the category "Coins & Paper Money\Coins\ World\North & Central America\Mexico\Mexico (1905-Now)". The seller is "nbasjy6" and is located in Kent, Washington. This item can be shipped to United States.