COLOMBIA. 1873 pattern Decimo. Medellín mint. Restrepo P40. Silver-plated bronze. SP-65 (PCGS).Reeded edge. The uniface reverse form of this essai, with a totally blank obverse. Described as silver-plated bronze by PCGS but betraying no evidence of bronze metal beneath or of being plated. Fully brilliant, boldly mirrored, and deeply lustrous. A beautiful piece.From Christies, January 1974.