Mexico, 1979 1 Onza, Medallic Bullion Coinage, Silver .925, UNC

KM-M49b, Mexico 1979 1 Onza, Medallic Bullion Coinage. (Plata Pura)

Silver 33.625 grams – .925

Obverse: Coin mint called “de balancín” (of sway), used in Mexico City Mint to make their first coins. This device uses the rotation of a pole on top with weight on a side to get enough speed to force a spiral down and mint the coin (later updated to use steam and then electric motor but the method was the same, with the issuer name around the rim and the date to the left

Reverse: Scale as a centerpiece with the weight as legend around, the purity at the top-left, and the weight in grams at center bottom, and mint under

Mint: Mo, Casa de Moneda de Mexico, Mexico (1535-date)

UNC