Watch List notes:

Two Pounds 1831 Plain Edge Proof S.3828, weight 15.51 grammes, UNC, cleaned and with some scratches in the fields and on the bust, nevertheless retaining considerable mint lustre, and given the tiny mintage of this issue, always a coin in high demand. Stated by Krause to have a mintage of just 225 pieces, of which 150 were in sets

Estimate: 12000-15000 GBP