Mole,
Personally I have no doubt that the pistol is a Lehigh Co. product as it just has too many Lehigh characteristics to have been made anyplace else. As with most pistols it's still original flint, and has a nice gunsmith made lock. To me it looks all original except the ramrod, with almost all of the original finish still on the wood. The finish is chipped and worn through in a few places and looks like a very light reddish toned varnish
Rich, I think the wood was finished first with oil or AF to bring out the color, then coated over with the varnish, but it's hard to tell for sure at this point.
When I first bought the gun, I wanted to take it apart to look for marks on the underside of the barrel or the inside of the lock, but the screws didn't really want to move and there's a lot of hardened gunk around the lock and inlet, so I just left it as is. I did make a better looking ramrod, but that's it.
John