Watch List notes:

BRITISH COINS, Charles I, Nicolas Briot's Coinage (1631-1639), Silver Half-Groat, crowned bust left, value behind with lozenge each side, B between pellets below, initial mark lozenge, rev quartered shield of arms on cross fourchée, 1.04g (Brooker 721; N 2302; S 2856). Good very fine, toned.
from the David Sellwood collection

Estimate: £150-200