William Kneass was the second Chief Engraver of the United States Mint from 1824 until his death in 1840. Kneass is credited with designing the "Classic Head" motif, which appeared on numerous denominations of American currency, including the gold quarter eagle ($2.50) and half eagle ($5.00) gold pieces from 1834 to 1839. He also modified John Reich's "Capped Bust" design for use on the half dime through half-dollar from 1829 to 1837.

The half eagle is a United States coin that was produced for circulation from 1795 to 1929 and in commemorative and bullion coins since 1983. Composed almost entirely of gold, its face value of five dollars is half that of the eagle coin. Production of the half eagle was authorized by the Coinage Act of 1792, and it was the first gold coin minted by the United States.