The value of a 1959 Mexican peso would actually be dependent upon a number of factors. The most important factor being the condition of the peso.
Nobody. What is now known as the European Union was not founded until 1957. The name European Union was not actually given to this organisation until 1992.
Just acquired one of these as a gift from my folks. Based on gold prices in Jan 2011, it should be worth approximately US $400 if it's real. Value will go up and down with the price of gold. According to my research online the coin contains 7.5 grams (o.2411 Troy ounces) gold in 90% composition (21.6 Karat).
Mexican Academy of Sciences was created in 1959.
The Chevy Show - 1959 Mexican Fiesta was released on: USA: 27 March 1960
Carlos Muñoz - Mexican footballer - was born on 1959-08-09.
The 1959 Lincoln cent is still in circulation and is only face value.
1962 cinco centavos gold mexicanos
Pancho Pantera is a Mexican cartoon logo boy used on the Mexican chocolate brand Choco Milk, since 1959.
Assuming that you are referring to a 20 Peso gold coin from Mexico dated 1959, it is most likely that you have a restrike (only 13,000 were produced in 1959, but over 1,000,000 - dated 1959 - were produced in the decade that followed). It would appear that it has little value over the gold value, which is about US$453 as of the end of July 2009 (the coin contains 0.4822 troy ounces of gold). If it is in uncirculated condition, you should see a coin dealer (preferably one who specializes in Mexican coins), as there may be a premium over the gold value.
The bullion value of the coin would be based on the price of gold. The collectors value could be higher.
A 1959 NICKEL is still worth 5 cents only.