Watch List notes:

BRITISH COINS, George III, Silver 'Northumberland' Shilling, 1763, young laureate and draped bust right, rev crowned cruciform shields, garter star at centre, edge obliquely grained (ESC 1214; S 3742). A few tiny hairlines and minor graffito below truncation, otherwise about very fine, toned.
from the David Sellwood collection

Estimate: £300-400