Thanks for your honest, civil answer Jim, I'm just trying to figure out what the guestimates are based on, I guess only time, and seeing a lot of guns, shows, auctions etc. and experience over many years is the only way to build up that kind of knowledge,I would say it is 95% if the rear backstrap is as nice as the front one. Those percentages are a bit problematical, since no one figures out how many square centimeters or whatever there is on a gun and exactly what percent of the original finish each square has in it. It is really a sort of "guesstimate", not a mathematically exact percentage.
Some writers rate a good refinish as equivalent to a 60% finish; others consider a refinish as 0% original (which it is) and don't rate a refinished gun at all. In general, collectors would prefer some original finish to a refinish, but if the gun were very bad (rusted and in general horrible shape) a good refinish would be better than such a bad finish (which is not "original" either).