I've got a few guns that were passed down to me from my Grandfather. Most of them are pretty straight forward shotguns and newer revolvers. There is one old revolver in the collection though that took me a little while to identify. I've come to the conclusion that it's one of the S&W model 3 -3rd revision Russians. From the wood grips, etc I assume a pretty straight forward, plain mass produced gun. I can identify the following markings on it.
On the bottom of the grip:
1874 in side a square on the far top
502xx serial number below that.
Along the far bottom is what is most likely a 'P' but nothing else shows up. It's pretty scuffed up right there.
I did open up the grips and the same serial number is engraved on the far (side opposite where the screw comes out) grip.
When i open up the gun I find a '166' along the top latch piece. The same '166' is on the right side of the top piece of the gun where the latch comes down. And it's also on the back of the cylinder.
That's all the marking that I can find at all. I'm interested enough in it to send in a information request to S&W but don't see their name imprinted anywhere on it. My question is do I have an actual S&W? Doing some reading it looks like it was reverse engineered and quite a few were made in both Russia and German? Is there a solid way to tell the difference?