Watch List notes:

BRITISH COINS, Charles I, Obsidional Coinage, Silver Shilling, 1648, Pontefract besieged, struck on an octagonal flan before the execution of Charles I (June 1648 - March 1649), CR at centre, crown above, legend DVM:SPERO.SPIRO outer beaded circle both sides, rev castle gateway with small flag at top P and C either side of flag, date below, OBS to left, sword in hand right, 5.16g (Hird 272-4; Brooker 1232; N 2646; S 3148). About very fine, toned.
from the David Sellwood collection

Estimate: £2000-2500