Sweden
Frederick I copper Plate 4 Daler 1739, KM-PM74, AAH-202. Some of the corner stamps are softly struck, but the dates are all full, with the center stamp bold. The surfaces are lightly porous with medium brown patina. This example, because of the surface porosity, has probably sent time in saltwater, but the color, and overall appearance is nicer than one expects fron sea-salvaged pieces. A very scarce denomination.
HID02901242017
Estimate: 1000-1200 USD