These coins are actually extremely common and are merely worth the silver that is in them. Mexico is continuously making new money. Old money is not worth anything and it cannot be used later either. In the 90s, Mexico revalued its currency. Coins from all the old eras are basically souvenir material.
Here is a bit of info about the coins for those wanting to know more about them. The diameter of the coin is 38mm. The weight is 22.5 grams. The thickness is 2mm. The composition of the coin is .720 fine silver with .5209 pure silver and .280 copper. Mintage of this coin in Mexico totaled 30,000,000. The mint mark is the letter ‘M’ with a small ‘o’ that is above this ‘M’. With the type 1, the rings are aligned and the snake tongue is straight. In the type 2, the center ring is lower. These coins were minted in 1968 to commemorate the Olympic Games held in Mexico. The obverse side features the Mexican coat-of-arms and an eagle with a snake in its mouth that faces left. It has the following inscription: "25 Estados Unidos Mexicanos 25 Pesos Ley 0.720”. The artist was Ricardo Vasco. The reverse side of the coin features the Olympic Rings that sit below an Aztec native who is dancing. The background features a numeral design. It has "Juegos De La XIX Olimpiada Mexico 1968” imprinted on it. The artist was Lorenzo Rafael. The edging features incused lettering that reads "Independencia y Libertad”. Back in the 14th century, people were told by a certain Aztec priest that if they saw a snake in the mouth of an eagle sitting on a cactus then that is where a city would have to be built. That city would be called Mexico City.
Here is a bit of info about the coins for those wanting to know more about them. The diameter of the coin is 38mm. The weight is 22.5 grams. The thickness is 2mm. The composition of the coin is .720 fine silver with .5209 pure silver and .280 copper. Mintage of this coin in Mexico totaled 30,000,000. The mint mark is the letter ‘M’ with a small ‘o’ that is above this ‘M’. With the type 1, the rings are aligned and the snake tongue is straight. In the type 2, the center ring is lower. These coins were minted in 1968 to commemorate the Olympic Games held in Mexico. The obverse side features the Mexican coat-of-arms and an eagle with a snake in its mouth that faces left. It has the following inscription: "25 Estados Unidos Mexicanos 25 Pesos Ley 0.720”. The artist was Ricardo Vasco. The reverse side of the coin features the Olympic Rings that sit below an Aztec native who is dancing. The background features a numeral design. It has "Juegos De La XIX Olimpiada Mexico 1968” imprinted on it. The artist was Lorenzo Rafael. The edging features incused lettering that reads "Independencia y Libertad”. Back in the 14th century, people were told by a certain Aztec priest that if they saw a snake in the mouth of an eagle sitting on a cactus then that is where a city would have to be built. That city would be called Mexico City.
