Watch List notes:

Great Britain (Bank of England), 1/2 dollar, oval George III countermark (1797-99) on a Madrid, Spain, bust 4 reales, 1793MF, NGC AU 53, c/s UNC standard. Sp-3767; KM-unl. Rare host (unlisted in KM), deeply and vividly rainbow toned (with distinct ring of color change at legends) over lovely luster, marks in fields but minimal wear, the countermark bold and complete, all conservatively graded in our opinion. NGC #4494789-006.

Estimate: $500-750