Watch List notes:

George IV (1820-30), Proof Crown, 1826, bare head left, rev. crowned shield with heavy garnishing, motto below, decus et tutamen anno regni septimo on edge, 28.21g (ESC 2336 {257}; S.3806), portrait more softly struck, otherwise attractive tone overlying brilliant surfaces, a pleasing extremely fine, rare.
provenance
Spink Numismatic Circular, November 1992, no. 6656 - £750
Estimate: £6000 - £8000