Hi Phil. During the 18th C. every hunter, whether a common man, or a man of nobility, carried a medium to large "rifle knife" as the guns were flintlock with one shot available. The knife was primarily a backup if ever needed, and a handy general purpose knife when one had a cutting chore. Many of German descent often carried a short sword, called a hunting sword. The rifle knife could be considered more of a weapon than merely a knife. Often the common man would also have at least one other more suitable to do the skinning and cleaning. Even the gentleman hunter would likely have at least a folder.
The blade is 1095, 9'' in length, with nearly a full distal taper. It is about 3/16" in thickness at the guard. If I remember correctly, about 1 1/4" wide. Early knives were usually much thinner than we are used to today. The temper is around 55 to 56 Rc.