Watch List notes:

BRITISH COINS, Charles I, Obsidional Coinage, Silver Shilling, 1646, Newark besieged, struck on lozenge shaped flan, large crown over value, C to left, R to right, beaded border both sides, rev inscription and date, NEWARK type, 5.62g (Brooker; N 2640; S 3143). A little off-centre as usual with one or two tiny die flaws, about very fine, lightly toned.
from the David Sellwood collection

Estimate: £1000-1200