Watch List notes:

Jamaica, 10 pence, "GR" counterstamp on a Lima, Peru, pillar 1 real of 1757JM. KM-3. 2.99 grams. VF counterstamp, Fine host with flat areas from the counterstamp, the fields deeply toned but with tiny punchmarks, popular issue. Note that technically this issue a double-countermark as opposed to a counterstamp (which is a two-sided stamp impressed on both sides at the same time), apparent on this coin in that the axes for the two countermarks are unaligned.

Estimate: $300