As with most die trials made from the 1860s onward, this piece was deliberately struck and was presented to A.M. Smith who was the author of the Mint's Visitors Guide. The unique copper example is ex A.M. Smith-Bolender 2/36 lot 23, Bolender 7/39, Bolender 2/52, Dr. Vickery, 72 ANA, Wyoming collection. Photo is of a color enhanced regular issue proof to approximate what one of these would look like and is courtesy of Heritage.