^Lot 866 Medellin, Colombia, 20 centavos, 1886, very rare, NGC AU 58 ("top pop").

Medellin, Colombia, 20 centavos, 1886, very rare, NGC AU 58 ("top pop"). Restrepo-291.1; KM-178.3a. Frosty details with luster surrounding to make for a slight cameo effect, with faint greenish-gold toning, choice example of a key one-year type struck in 0.500 fineness (the only such coin of this denomination), reportedly six known, tied with one other for finest at NGC. Please use this link to verify the certification number