Watch List notes:

Half Guinea 1787 Plain edge Proof S.3735 Wilson and Rasmussen 130, weight 4.78 grammes, Practically mint state with much brilliance, extremely rare with Spink now listing at £6500 FDC, Ex-London Coins Auction A128 7/3/2010 Lot 1306

Estimate: 5000-9000 GBP