I have a 1934 "un peso" silver 720 peso, what is it worth?
If it says "Ley 999" somewhere over its face, it should have an ounce of 99.9% pure silver.
a peso coin is made through melting of copper ores and molding it into peso coins
The circumference of a one peso coin is 2.4 cm. A peso is the currency for the country of Mexico.
Yes
The 1958 1 Peso coin from the Philippines is made of copper-nickel and features the profile of Manuel Roxas. A US silver coin from 1958 could be a Roosevelt dime, Washington quarter, or Franklin half dollar, which contain 90% silver. These US coins depict President Franklin D. Roosevelt, President George Washington, and Benjamin Franklin, respectively.
A peso coin is a form of currency used in countries such as Mexico, the Philippines, and various countries in South America. It typically features the denomination on one side and national symbols on the other. The value of a peso coin can vary depending on the country in which it is used.
Without seeing your coin it's not possible to say for sure. However, if it is a standard circulation coin its value is very small. Inflation caused Mexico's currency to become nearly worthless by the late 1980s. In 1993, all existing pesos were replaced by the "nuevo peso" (new peso) at an exchange rate of 1000 to 1. The new peso is currently worth around 11¢ U.S. so one old peso would be one one-thousandth of that, or $0.00011.
The 1975 cinco peso coin from the Philippines contains 40% silver and 60% copper.
Mexican peso
A 1 peso coin in the Philippines is composed of 75% copper and 25% nickel.
A 1921 Mexican 1 Peso coin contains 0.3856 troy ounces of silver.