Watch List notes:

Popayan, Colombia, 1 peso, 1863, very rare, NGC XF details / cleaned. Restrepo-316.1; KM-139.2. Very rare and important one-year type (effectively the only silver 1 peso of this mint) of which only a handful are known, several of them sold publicly in recent years (like the ones from the Eldorado and Nueva Granada collections), none of which is significantly better or worse than the present piece, which shows dark but subtle rainbow toning over what look to us like natural surfaces (no evidence of cleaning that we can tell save for a gentle rub on the high points), notably lacking the minor flaws that the others possess (like rim bruises and weak strike). As Restrepo mentions, the date shows evidence of re-punching over something else, but also this coin in particular displays the ghost of an E in the field after DE.

Estimate: $3500 - $5000