@cornstalk ,
This is the book referenced in my earlier post:
American Primitive Knives 1770-1870, by Gordon B. Minnis, published in 1983 and currently (I believe) out of print. It only has 100 pages. The title is accurate... These are backwoods, frontier knives, not cutlery from the better known commercial cutlers of the period. It is well illustrated in black-and-white, and broken down into sections including belt knives, "utility knives," patch knives, daggers, and Bowies.
These two are listed under "Patch Knives," but there are some others in the book that are larger and made in pretty much the same way. Anyway, these are sort of what I was thinking of when I made my previous comments:
I'm sorry I was unable to get the captions completely within the snapshots. Minnis described both of these as "the simplest possible construction," by which I believe he meant a rat-tail tang in a section of antler. I think these two just have the handle driven onto the tang. One thing I have heard of but not tried is to soak the antler for a day in plain water to soften it up, then just drive it onto the tang and leave it until it dries. The antler evidently shrinks around the tang and forms a permanent bond. However, Minnis shows at least one larger knife that is made just like yours, with a full-length tang in a hollowed handle, with the space filled with lead (Plate 14 in the book).
I don't know if your knife is an antique or not, but even if we assume the knife you have there is of fairly recent construction, it is absolutely "correct." Minnis' book shows that there are examples of antique knives extant which were made in exactly the same way.
I admire finely made guns and knives as much as anybody, but plain, simple, and even crude backwoods pieces that got the job done have a special appeal. As for the decorated sheath, I would think of it as an expression of the regard its owner had for this sturdy, functional, and dependable knife.
Notchy Bob