Watch List notes:

George IV (1820-30), silver Proof Sixpence, 1826. Second bare head left, date below, legend and toothed border surrounding, GEORGIUS IV DEI GRATIA, rev. inverted die axis, crowned lion standing left on large crown over emblems, legend commences lower left, BRITANNIARUM REX FIDEI DEFENSOR, edge milled (Bull 2433; Davies 271 dies 2+A; ESC 1662; KM 698). Darker tone, a little patchy in places, otherwise practically as struck, has been graded and slabbed by Coin Grading Service UK as UNC90. Estimated Value $1,150

CGS UK certification 9094-SP.G4.1826.06. London Coin Grading Service as it is now termed, claim that grade 90 in their 100 point system is a traditional "near FDC" and equates to an American Sheldon scale of 66.