Watch List notes:

BRITISH COINS, George III, Gold Half-Guinea, 1788, fifth laureate head right, rev crowned quartered spade-shaped shield of arms, date below, 4.20g (MCE 428; S 3735). Uneven red tone with a couple of blemishes, otherwise extremely fine.
ex Henry da Costa Gomez collection (d.1971), Morton & Eden auction 9, 25-26 May 2004, lot 795

Estimate: £400-500