Watch List notes:

BRITISH COINS, William IV, Silver Halfcrown, 1836, bare head right, W.W. in script on truncation, rev quartered shield of arms with an escutcheon of the Arms of Hanover, with garter surrounding upon crowned mantle, date below (ESC 666; S 3834). A little weak on the high points, practically extremely fine, toned.
ex A Fine Collection of Halfcrowns, property of a gentleman, Morton & Eden auction 9, 25-26 May 2004, lot 639 (part)

Estimate: £350-450