Guatemala, 8 reales, sun-over-mountains countermark (Type II, 1839) on a Potosi, Bolivia, cob 8 reales, 1766V-(Y). KM-100. 26.73 grams. Full countermark (VF), good full cross and pillars with peripheral crudeness and tiny edge-splits (net Fine), lightly toned.
Estimate: $175 - 250