Neat indeed! I would guess that this was done sometime in the first quarter of the 20th century, but only a detailed examination of the internals will tell you how much is the original gun, and how much was assembled from parts. Even that won't really give you much of a clue as to the guy who did the work unless somebody here is familiar with the name or you find more 'smith ID inside--on the wood, under the buttplate, etc.

Let us know how it SHOOTS! And what the scope is....