The following images and information are courtesy of the Rock Island Auction Co. This rifle was sold on Sept. 9, 2018 as lot no. 3118.
The Büchsenmacher Chretien Koerber (also known as Christian Körber) lived and worked in Ingelfingen on the Kocher River in what is now the German state of Baden-Württemberg. He was a court gun maker to the Prince zu Hohenlohe and the Duke of Württemberg. The left barrel is 28 ga. smoothbore while the right barrel is a 55 caliber rifle. The barrels are 27 inches long.