Watch List notes:

British Coins, George III, pattern halfcrown, 1817, a mule of a currency obverse and a pattern reverse, laureate head r., date below, rev. crowned shield of arms within Garter, lower shield garnishing overlaps garter, wt. 14.12gms. (ESC.619/627), about extremely fine and toned, very rare
*ex St James's Auction 18, 27 September 2011, lot 412 (2000-2500 GBP)