2009-Mo Mexico Libertad 1 Onza Plata Pura Ley. 999 Fine Silver 1oz Mexican Coin is a round silver coin minted by the Mexican Mint. This 1 oz silver coin boasts a fineness of 0.999 and contains one ounce of precious silver. As a popular choice among collectors and investors, this Mexican coin is a valuable addition to any portfolio or collection. Its unique design and high silver content make it a desirable piece for those looking to invest in pure silver bullion. Thanks for viewing my listings.