Alrededor de 350 pesos mexicanos (27 dolares americanos)
"Una Onza Troy de Plata Pura" is Spanish for "One Troy Ounce of Pure Silver". I think that you're asking about the Mexican "Onza" coin, although it has only been issued since 1982, which contains 1 troy ounce of silver and trades at its bullion value (although some dates trade at a small premium if they are in Brilliant Uncirculated or Proof condition).
The Molders of Troy - 1980 TV was released on: USA: June 1980
Troy Selvey was born in 1980.
Troy Kurtis was born in 1980.
Troy Mandaloniz was born in 1980.
Troy Murphy was born on May 2, 1980.
Troy Murphy was born on May 2, 1980.
Troy Bell was born on November 10, 1980.
Troy Cate was born on 1980-10-21.
Troy Simon was born on 1980-07-20.
Troy Ready was born on 1980-05-15.
Troy Milam was born on 1980-06-30.