George III. AV Half Sovereign, 1817. 

GEORGIUS II DEI GRATIA, laureate head right.
BRITANNARIUM REX F D, crowned coat of arms.

Seaby 3786; Fr-372; KM-673. 

Courtesy Ira & Larry Goldberg Auctioneers, Beverly Hills, CA. www.goldbergcoins.com
Sale 31: The Pre-Long Beach Auction May 30 - June 1, 2005, Lot 2522