2015 Mexico Silver Kilo Reverse Proof .999 32.15oz Box COA | eBay
1 Onza (Pattern strike) - Mexico – Numista
Troy Ounce: Definition, History, and Conversion Table
Lot: 1315 | Mexico 1 Onza 1979 Obverse: Coin mint called 'de balancín' (of sway), used in Mexico City Mint to make their first coins | AUCTION NR. 25 | Numisbalt | Sixbid