Argentina
Rio de la Plata. Republic 8 Reales 1837/6 RA-P AU Details (Surface Hairlines) NGC, La Rioja mint, KM20, CJ-38. Very few handling marks account for the assigned designation. Nevertheless a very attractive type coin for this popular sunface type with beautiful toning. Despite being still unlisted in KM, all known specimens show some evidence of the 1837/6 overdate, as noted by Janson. On some specimens such as the present one, that evidence is only faint, which in turn would account for the (apparently not existent) reported plain 1837 date.
Estimate: 700-900 USD