Well, the best way is to see a nickel gun and then look at a stainless gun. Nickel is very mirror bright if in original condition. If there are a lot of scratches in the nickel, I guess it could begin to look like stainless to someone. On the stainless gun, you will see a �grain� to the metal from polishing. So the stainless will have less of a mirror finish unless someone has bright polished the stainless. If you can�t tell the difference, then you really need to think twice about laying down big coin on a Python. For some reason, the Nickel guns are the least valuable of all the Pythons. And depending on what mood the market is in, Stainless is either worth a little more, or about the same as a very nice condition blued gun.
Notice the mirror like finish of the nickel gun.
Notice the frosty, more subdued look of the stainless gun. Also, you�ll see a LOT of stainless Pythons with Pacymayr grips.