You have a neat Germanic rifle. Here are my thoughts... I think it's maybe 1710 give or take a little. With this being the case, it would have been originally flint ignition. Seems the conversion was done very well. Little evidence of holes etc. are visible. The decoration is certainly baroque in nature, but has a lot of folk art influence as well. The flat faced lock combined with the overall style puts it after the turn of the 18th century. This is about all I would have to say. With a little research I'll bet you'll be able to pin down the location it was made a little closer. This really isn't where my interests lie, but if you find the right person, you should be able to obtain a little more detailed and certain information.