Well Deepwoods.

Generally I would say if the entire is original, but refinished
with the correct finish of the age from it was build then 99,99% of the gun is still there.
To disregard a rare and attractive gun, just because a screw looks wrong or has been replaced becomes just too queer imho. Have the gun been rebarreled,restocked, then it should dis regarded
as a collectors gun. Has the original barrel been shot out, new sight been installed and the metal been saltblued and the stock been altered to a shape that are plane wrong then ofcouse that too
retract from any kind of collector's interest.