This is a 1968 Mexico Silver 25 Pesos Olympic coin.
The coin is made of .720 fine silver and weighs 22.5 grams, containing approximately 0.5209 troy ounces of silver.
It was issued to commemorate the XIX Summer Olympic Games held in Mexico City in 1968.
Features the Mexican coat of arms (an eagle perched on a cactus with a snake in its beak) with the denomination "25 Pesos" and the silver fineness "LEY 0.720" inscribed below.
The other side depicts an indigenous tribal figure playing an ancient Mesoamerican ball game, with the Olympic rings below.
