Not worth much, but neat coin!
From Wikipedia:
Throughout most of the 20th century, the Mexican peso remained one of the most stable currencies in Latin America, since the economy did not experience periods of hyperinflation common to other countries in the region. However, after the Oil Crisis of the late 1970s, Mexico defaulted on its external debt in 1982 and experienced several years of inflation and devaluation until a government economic strategy called the "Stability and Economic Growth Pact" (Pacto de estabilidad y crecimiento económico, PECE) was adopted under President Carlos Salinas. On 1 January 1993, the Bank of Mexico introduced a new currency, the nuevo peso ("new peso", or MXN), written "N$" followed by the numerical amount. One new peso, or N$1.00, was equal to 1000 of the obsolete MXP pesos.
On January 1, 1996, the modifier nuevo was dropped from the name and new coins and banknotes – identical in every respect to the 1993 issue, with the exception of the now absent word "nuevo" – were put into circulation. The ISO 4217 code, however, remained unchanged as MXN.
Thanks to the stability of the Mexican economy and the growth in foreign investment, the Mexican peso is now among the 15 most traded currency units in the world, and is the most traded currency in Latin America. It has been fairly stable for the last few years; since the late 1990s the peso has traded at about $9 to $13 to the U.S. dollar.