Watch List notes:

Halfcrown 1840 ESC 673, Bull 2715, VF or slightly better with a small spot below the shield, and with some weakness to the lower right of the crown. Halfcrowns of 1839 and 1840 are the only dates with W.W on the truncation, and given the rarity of the 1839 coin, the 1840 is always a popular type coin

Estimate: 100-180 GBP