EXACT COIN PICTURED IS FOR SALE For sale is a 1980 Mo Mexico Balance & Scale / Screw Press Onza .925 Silver Casa de Moneda coin featuring a denomination of 1 Peso. This historical piece originates from Mexico and is made of high-quality silver with a fineness of 0.925. It weighs 33.625 grams so the total silver content is just over 1 Troy ounce. Uncertified and in excellent condition, this coin represents a unique and valuable addition to any collection of world coins.