Costa Rica, 1 real, 1846 JB counterstamp (Type IV) on a Potosi, Bolivia, cob 1 real, date and assayer not visible, PCGS VF30. KM-47. 3.29 grams. Nearly full counterstamp with contrasting toning in crevices, the host practically slick but with nearly full cross within the reverse of the counterstamp.
Estimate: 200 - 300 USD