Coin was Antiqued in 2018 by a private mint in limited quantities! Not an original Mexico antiqued finish! The 2018 Mexico 5 Onza Libertad Antique Finished by Private Mint (not by Mexican mint) Silver Plata Pura is a striking silver coin minted in Mexico. This coin features the iconic Mexican Libertad design and is made of. With a precious metal content of 5 oz, this coin is a valuable addition to any collection or investment portfolio. The proof strike type adds to its collectible appeal, making it a coveted item among numismatists and investors alike.