Hi,
Joe is right but there are a few places you can look on original guns that can give you an idea of the level of finish. Often, the bottom of the cheek piece was sawed straight across and you may see those saw marks if you look closely at the original gun. The bottom of the butt stock is another place because it is often exposed (almost) end grain, which can be very hard, and removing all file and scraper marks can be time-consumingly difficult. Finally, if there is carving, look closely at the background in corners. Is it smooth or can tool marks be seen in the wood? My impression, having finally looked at quite a few originals, is that the level of finish on civilian guns was pretty high but you often can still see tool marks in those places I mentioned. I firmly believe the makers were not as obsessed with perfection as we are today and that makes sense because they had harder working conditions and were not doing it for fun. Also Bnail, my impression was they were not obsessed with symmetry. For example, lock panels were not necessarily mirror images.
dave