That's a terrific find. I don't think overall it's nearly as early as the guard, which I'm sure is secondary usage as well as possibly the pipes, but it certainly could date to the War-era and represent a utility piece made for immediate need. Too bad the lock is missing so many exterior components which would better help to date the lock as well as point toward origin. The carving is spectacular and whoever stocked and briefly carved this rifle sure knew what he was doing.
It's possible the little teardrop bolt escutcheons are original, or possibly could have been added later to cover bolt wear. I have no way of knowing, just mention it to illustrate that I would not use those in any way for dating or location.
Given the shape of the lock plate, it looks to my eye that the lock side lock panel is not nearly as "straight swept" along the top edge as the side plate side panel. I see this on a lot of rifles - I have no explanation for it other than that (1) it's faster when roughing out the stock and (2) you can't view both sides at the same time so it's not nearly as important to perfectly match both panels as would be considered today. The important symmetry is viewed from top or bottom where you actually can see both sides. The lion and lamb rifle is also as well known example of being stocked like this, much more straight-swept along the top edge on the sideplate side than on lock side.
Could have been made anywhere, really, and I think the best characteristic to attempt to use for attribution is matching up that tang carving.