MEXICO. Onza, 1979-Mo. Mexico City Mint. PCGS MS-65.
KM-M49B.3. Type 3, left scale pan points to "U" in "UNA". Gem quality surfaces display a consistent frosty texture that flashes with dynamic spirals when rotated. Argent save for hints of rich mauve and azure tone at the rims, while a slight mottled overtone across the fields can be witnessed at select angles.
Estimate: $60 - $100