Don is most likely correct on his ID. When these weapons were redone by the Belgians they often put a Liege Arsenal mark on the barrel (top, near the nipple). Your pictures do not show this part of your gun but look for such a mark. It will usually be an oval with some rendition of L and G. Just about every arm produced by every country in Europe from the late 18th Century on up into the 20th Century was copied, sometimes under license, sometimes as a free lance operation. Depending on the manufacturer they were sometimes as good as the originals. Anyway, look for the Liege mark.