Excellent research Patrick, all well thought out and defined! This shows every sign of being a pre-Lorenz Austrian military firearm.

Texascheesehead, you need to do your research with something other than the internet, right now you are limiting yourself by using limited resources. Now, much good information is out there and, thanks to many like Patrick, the internet resources increase over time but there are many good resources out there on paper and the internet shows little sign that it will overcome it. Besides, what will happen when someone "pulls the plug"? Someday, someone may very well do that. I also can not agree that the chisel-cut marking on the barrel is a date, it is an assembler's batch number.

Patrick, is it possible that this was once an 1844 Kammerbusche? I am not necessarily in total agreement that the percussion bolster shown in Cheesehead's photos is not original, it is too complicated for civilian, post military work. The 1844 Kammerbusch was .69 caliber IIRC.