George III (1760-1820), Pre-1816 issues, Pattern [believed to be for a Penny], 1799, by J. Westwood, in copper, bust right dividing date, rev. vigebit in omne aevum in four lines, edge plain, 24.30g/12h (Montagu 28; cf. BMC pp.237-8; BHM 465; Selig 1445). Minor adhesion on obverse, otherwise about as struck, very rare £300-£400

DNW Auction 70, 20 June 2006, lot 498