This is an obverse die trial in white metal of the 1806/4 (Breen 1) variety. For many years it was believed to be a 1796 die trial but the star arrangement is definitive. It is believed to have been struck outside the mint by Montroville Dickeson or Joseph Mickley from dies sold as scrap.
The piece is unique and is ex Mehl 5/24 lot 119?, Farouk, Hydeman, Kosoff-Bowers and Merena 11/85, Bowers and Merena 6/91.
Photo is a scan from the Bowers and Merena's Kosoff sale.