JAMAICA. 5 Pence (1/2 Real), ND (1758). George II. PCGS VG-08.
KM-1.3; Prid-8. The local Jamaican Act of 1758 provided for "GR" counterstamps to be placed on circulating coins of the Latin world at this time. Here, a Peruvian 1/2 Real of 1758 was counterstamped. Host coin grades VG, countermark is a bit better.
Estimate: $200 - $250