Watch List notes:

BRITISH COINS, William and Mary, Silver Halfcrown, 1693, 3 over inverted 3, second conjoined busts right, rev crowned cruciform shields with monograms in angles, lion of Nassau at centre, date surrounding, edge inscribed in raised letters, dated QVARTO (ESC 521; S 3436). Well-toned, light bagmarks and surface hairlines, bold very fine.
from the David Sellwood collection

Estimate: £600-800