Separate names with a comma.
Never use the Lead Remover cloth on the exterior of your blued guns!
Sarco used to have parts for them.
Interesting that the "W" has been removes with a flat graver.
Regardless, those are not Smith & Wesson grips. Belgian guns were marked in all kind...
Those are not S&W grips. S&W never made a gun with a grip frame like that.
Besides- they only have an "S".
The grips are original to the gun.
You can easily look your gun up.
I cut down a Stevens 520 20 ga. and made a pistol grip for it in the 1970s. It was about 26.5" long and I carried it as a car gun.
Most definitely a shotgun. The front sight is soft-soldered onto the barrel. You can see the excess lead solder.
The "engraving" on the lock appears to actually be stamping, not hand engraving-which would have been the method of decoration in the 1800s.
There are replica Thompsons available- from rubber guns to fake receivers using all the correct parts. Why not just find one of these?
Pistol grip only shotguns that have an overall length of 26" or more have never been NFA items.
What kind of ammunition does the case have in it? Show us a picture, please.
The gun was badly rusted and then reblued.
It's only value is as a curio or keepsake.
Or, you can soak the gun (without grips) in mineral spirits.
The term VeloDog is often used incorrectly.
There isn't any rust because someone has wire-wheeled it off.