The 1985 Mexico Libertad 1 Onza MS66 NGC is a highly sought-after coin from Mexico, composed of 0.999 silver. This coin has been professionally graded as MS 66 by the Numismatic Guaranty Company (NGC), ensuring its authenticity and quality. With its historical significance and high grade, this coin would be a valuable addition to any coin collection, reflecting the rich numismatic heritage of Mexico.