Thailand
Rama V copper Uniface Specimen Pattern Baht ND (ca. 1868) SP64 Red and Brown PCGS, Obverse as KM-Pn28, reverse blank. The sharp, near-perfect strike usually seen on patterns of this issue. The fields are reflective and the obverse has original mint golden luster around the devices. We can find no record of another uniface strike of this pattern. Possibly Unique.
Estimate: 3500-4000 USD