Unbound. Engraved copper plate. Measuring 2.25" x 3.25". The plate was stored with two proofs of the engraving (made photographically) that were folded around the plate. Very good or better, bright copper, with no discernible wear to the engraved lines. Depicts a bald eagle carrying a shield in its talons, in flight with a continental land mass in the background, and facing a fortified Civil War camp with an American flag and cannon in the foreground. "Engraving by Jacob Stadelman, done about 1865," in pencil on the back of the proofs. Jacob Stadelman was a captain in the First Regiment Pennsylvania Reserve Cavalry from August 8, 1861 to March 26, 1862. Unique.