Watch List notes:

BRITISH COINS, William and Mary, halfcrown, 1689, PRIMO, caul frosted, pearls, conjoined laur. busts r., rev. second crowned shield of arms (S.3435; ESC.505), struck on a large flan, light scratch or possibly die flaw on reverse flan at lower half of shield, otherwise good very fine or better, a most attractive coin

Estimate: £400-450