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This copper half-penny coin from United Kingdom was issued after King George III suffered through his first two bouts of insanity in 1806 and 1807. Its obverse side features the portrait of King George III. Its reverse side features Britannia. The coin weighs 9.22 g and has a diameter of 28.7 mm. The coin also comes with a Certificate of Authenticity from the American Numismatic Association.