Colombia (struck at the Paris Mint), silvered-bronze proof uniface obverse essai 1 peso, 1873, reeded edge, NGC PF 58. Restrepo-unl; KM-TS7. Somewhat darkly toned over muted luster with a few minor marks but no actual wear, oddly missing in Restrepo as uniface, incorrectly labeled by NGC as a reverse trial.
Estimate: 1500 - 2250 USD