Although described as a regular dies trial piece in copper, it is more likely that this was deliberately struck for sale to a collector.
This is a rare off-metal piece which is possibly unique. If it is unique, it is ex A.S. Jenks (Cogan 4/1877), Brenner-1914 ANS exhibit, Lohr, RARCOA 2/72, Heritage 1/2002. It is graded PCGSAU55 and is almost certainly the Lohr, RARCOA piece.
Photo courtesy of Heritage.