1 Oz. Aztec Calendar Authentic copper Round This beautiful physical commemorative coin displays the Aztec Calander in tribute to the ancient Aztec civilization. The Aztecs of ancient Mexico measured time with a sophisticated and interconnected triple calendar system that followed the movements of the celestial bodies and provided a comprehensive list of important religious festivals and sacred dates This coin-shaped copper round is manufactured in the USA and made from real .999 fine copper / 1 Oz. It holds its value in copper and will make a beautiful addition to any collection.