For your consideration, the Akah Bchsflinte (Combination-Gun) chambered in .22 Hornet / 28 Gauge. A combination gun, also known as a Cape Gun based on their popularity in South Africa's cape colony in the early 19th century. This one German made, retailed by Akah (Albrecht Kind) possibly made by J.P. Sauer, though no decernable maker's mark. It has the Crown over S, W & U for the 28 Gauge barrel and Crown over G & U for the .22 Hornet barrel. Caliber is marked on underside of barrels.