What time does the bar open?
I find the OP's gun intriguing. You guys know me, so you probably know I'm an Occam's Razor kinda guy-
"The simplest explanation is usually correct".
So, normally, I would be saying "Yeah, that's patina on an old blue gun" OR "Yeah, that old gun has been varnished or shellaced" OR "Yeah, that is years of nicotine and tar buildup".
BUT, I keep looking at the pics and seeing stuff that indicates some kind of applied finish-
like plating of some kind.
So I talked to my FIL and he just checked it with the cylinder open and in fact it does have a B in front of the same serial number (B62252), and these match the cylinder and grip.
So it was originally blued from factory, but it looks like there is copper verdigris (learned that word from Walter Rego- thanks).
???
It has been said that occasionally a blue gun was pulled from inventory and nickeled to fill an order. I think it is far more likely that a note was simply sent to the polishing department to pull a gun slated to be blued BEFORE it was blued and send it to the plating department.
Here is a nickel gun that I have which is marked with the B. Note that this gun shipped in the same era that yours did---
It was probably a special order since Roy says "This was a single {gun} shipment to Montgomery Wards which is unusual."
So, maybe your gun shipped blued, but there is a
slight possibility it did not.
So what is on this gun? I honestly don't know, but I can make a case that it is not varnish, or nicotine/tar, or just patina on the steel.
Look at these pics:
If it is nicotine/tar/smoke, how did it get
under the grips in such an even coating? If it is patina on steel, why is there no rust/pitting under the grips? You can even see the coating going up into the action, and the grip pin is coated----
Look at these areas. They look like typical bubbling and flaking we sometimes see on a nickel gun:
Now look at the pitting on the cylinder flutes. Notice how clean the pits are, and how white the bare spots are.
Could it be that this is a nickel gun that has been dipped in a strong chemical cleaner and/or acidic cleaner that discolored the nickel?
Maybe this was a blue gun that got nickeled later, and dipped in a harsh bath years later to remove some rust.
Or is it plated with something else?
I know I've never seen another gun that was this color. 