The regular dies trial piece in copper. As with most die trials made from the 1860s onward this piece was struck as part of the unique copper set of 1884 silver and gold coins complete from the quarter to the double eagle. It was presented to A.M. Smith, who authored the Mints visitor's guides.
The illustrated example is believed to be unique and has the following pedigree:
Bolender's 2/36, Farouk lot 2021, Rogers M. Fred, Bowers and Merena 11/95, Superior 5/2003, southern collection, Simpson collection.
Photo courtesy of Superior.