Watch List notes:

BRITISH COINS, Charles I, Obsidional Coinage, Newark besieged, Silver Halfcrown, 1646, on lozenge shaped flan, large crown over value, C to left, R to right, beaded border both sides, rev inscription and date, 14.25g (Brooker 1222; N 2638; S 3140A). Double struck (or overstruck on an earlier issue?), good very fine, dark tone.
ex St James's Auction 7, 7 February 2008, lot 165

Estimate: £1800-2200