Watch List notes:

George III (1770-1820), Guinea, 1774, fourth head, 6h (Murdoch III, 92[c]; Schneider II, -; MCE 379; S.3728), minor edge bump at 6 o'clock, otherwise residually lustrous, very fine.
provenance
Spink 246, 28 April 2017, lot 184
Spink 201, 26 November 2009, lot 321
Estimate: £400 - £500