Great Britain 1821 (Ag) Crown. George IV (S 3805): Crown with a Tertio edge. This coin is an exceptionally well-preserved proof coin with old cabinet toning in an extremely high grade. The highest graded by NGC. Ex-Thelleson Collection, sold at Sotheby's on 19-20, October 1931, lot 611
NGC Proof 66

NGC Certification : 1969516-015/66