Watch List notes:

BRITISH COINS, George III, Silver Sixpence (2), 1817, 1818, laureate head right, date below, rev crowned quartered shield of arms, an escutcheon of the Arms of Hanover, garter motto surrounding (ESC 1632, 1634; S 3791). Prooflike obverse, good extremely fine, attractively toned. (2)
from the David Sellwood collection

Estimate: £180-220