1979 Mo. MEXICO UNA (1) ONZA TROY DE PLATA PURA SILVER COIN KM # M49b.4 | eBay
1979 Mexican Silver Coin One Ounce UNA ONZA TROY DE PLATA | eBay
Mexico 1980 Onza Troy De Plata Pura Type III Sterling Silver - Etsy
1979 - 1980 Mexican Una Onza Troy De Plata Pura Coin .925 Silver 1oz Casa De Moneda 2x coins one of each date - Professional Dealers of Coins, Bank Notes and Bullion.
1979/9 RPD Mexico - 1 oz Una Onza Troy de Plata Pura .925 Silver Round - U1126 | eBay