Watch List notes:

COINS, EUROPEAN TERRITORIES, ISLE OF MAN James Stanley, 10th Earl of Derby (1702-1736), second coinage, Bronze Proof Halfpenny, 1733, Stanley crest, the eagle with child upon cap of maintenance, plain cap, date below, rev Triune (cf Pr 29C; cf S 7410; KM 3a). Mint state and rare, this combination of bronze proof with plain cap is unrecorded.
ex Dr R Caine collection of the Isle of Man, Spink Auction 145, 14 July 2000, lot 2715
ex Pridmore, Glendinings, 22 September 1981, lot 473, with tickets

Estimate: £300-400