Watch List notes:

Colombia, proof essai 1/2 decimo, 1873, NGC PF 63, finest and only example in NGC census. Restrepo-unl (cf 34 on p. 207); KM-Pn35. While rated Proof by NGC, this is actually a specimen strike, with bolder details and smoother fields, and marked ESSAI to right of date (unlike Restrepo-34), lustrous and devoid of marks or wear, with very light colorful toning. NGC #4668518-002.
(500 - 750 USD)