Watch List notes:

BRITISH COINS, Charles I, Silver Half-Groat, Tower Mint, initial mark castle (1627-1628), group A, type 1a without inner beaded circles crowned rose both sides, 0.93g (Brooker 660; N 2249; S 2823). Double struck and a little off-centre, otherwise bold very fine, darkly toned.

Estimate: £60-80