Brass stud that measures 1/2 inch in diameter, with light patina. This was probably from a knapsack, or a sword belt. It was recovered on the Pickett's Charge Field, on the Gettysburg Battlefield, by the late Gettysburg relic hunter John Cullison, who excavated Civil War artifacts at Gettysburg from 1935-1959. Mr. Cullison passed it on to the famous Rosensteel family of Gettysburg where it remained in their private collection until it was released in 1996. Very desirable Gettysburg relic.