El Salvador
Republic Counterstamped 2 Reales ND (c.1836) F15 NGC, KM26. "SAP" counterstamp upon El Salvador 2 Reales 1833. There is some controversy as to whether "SAP" is an El Salvador counterstamp. In this example, the host coin is a strong Fine, the counterstamp a bit better.
Estimate: 400-500 USD