Mexico
Republic silver Proof Onza 1983-Mo PR69 Ultra Cameo NGC, Mexico City mint, KM494.1. This is the highest grade to date at NGC as nobody has scored a 70 which is possibly but highly unlikely because of the sensitive surfaces. One of the Key issue within this series with a scant mintage of 998 pieces and and tied with many others.
HID02901242017
Estimate: 500-700 USD