Thanks again, @silverd510. Are you speaking of the Mexican 1949 Una Onza (.925 Sterling Silver, 33.625 Grams) Balanced Scale Coin? The Dealer had several 1979 & 1980 UO BSC, but I got this 1984 Libertad (.999) Onza. Wish I had got the older ones, now. Wasn't thinking. All $30 USD, each.