Spain
Isabel II Proof 20 Reales 1850 PR63 NGC, Madrid mint, KM593.2. As a significant rarity in Proof format, this selection does not disappoint. Squared rims with upset edges encase reflective fields bearing superbly detailed design details. A few errant marks are noted, but tend to blend with faint cloudiness and splashes of faintly iridescent tone in the legends and other protected recesses. Very rare and immensely desirable thus.
Estimate: 5000-6000 USD