Great Britain
William IV gold Proof 1/2 Sovereign 1831 PR62 Cameo NGC, Royal mint, KM716, S-3830, WR-267 (R3). Plain Edge. Sharp throughout with delightful field to device contrast and no noticeable surface-impairing marks; only light handling in the form of wispy hairlines define the grade. Originally issued as part of the coronation set of the year, and very scarce as such.
Estimate: 3000-4000 USD