2018 1 OZ GOLD REVERSE PROOF COIN. Gold Mexican Libertads are stunning coins that stand out in any collection and are produced by The Casa de Moneda de Mexico, the oldest mint in North America. 2018 was the first time ever that the 1oz Gold Libertad was minted in a reverse proof finish with a limited mintage of 1,000. Obverse: Features a sculptural relief design of the National Shield, encompassed by the legend “Estados Unidos Mexicanos” (United Mexican States), surrounded by different national coats of arms used throughout Mexico’s history. Reverse: Depicts two key symbols of the Mexican people: the Winged Victory statue in the forefront and the Mexican volcanoes in the background. Guaranteed by Banco de México. Limited mintage: No more than 1000 pieces will be available worldwide.