- The single finest graded example by both major grading companies and quite possibly the finest example available to collectors.
- A scarce and extremely popular proof issue.
- The result of a collaboration between three of the greatest sculptors and engravers in British history: F.L. Chantrey, W. Wyon, and J.B. Merlen.
NGC Proof 67 Ultra Cameo. Astounding, with a perfect cameo and entirely full strike. Immaculate, lustrous devices, with shadows of orange tone on obverse. Single finest (NGC & PCGS) and undoubtedly one of the finest known. Scarce and sought after.
Second bare head right, W.W. incuse on truncation; GULIELMUS IIII D: G: BRITANNIAR: REX F: D: [William IV, by the grace of God, King of Britain, defender of the faith].