The Columbia name was used by several manufacturers. Other markings could narrow it down, but the most likely makers are WH Davenport, Harrington and Richardson, and Hopkins and Allen. It's unlikely that the nickel was put in the stock by the manufacturer. If it was made by any of those I mentioned, it will be nickle (or bright, unblued steel), as stainless steel wasn't available in the time period it would have been manufactured.
Stainless is harder.
No real advantage to it.
You've left too many variables out of the question... Who is the manufacturer? What is the model number? How long is the barrel? What is the finish (Stainless, Blued, Nickel)? And, of course, what condition is it in?
On the frame and or barrel
I don't know, is it just the barrel or the whole gun? I'd buy just a barrel
Do a search for Jarvis. They make a bull barrel for the $597, it runs $198 in either blued or stainless.
the only one I know of is the model 66. Has plastic stock and it covers part of the barrel. The older autoloaders, had no stainless.
Look on frame inside the cylinder area to find the model number of a Smith and Wesson 357 mag snub 2 in stainless barrel
That is impossible to determine without knowing the manufacturer and model of the shotgun.
2nd sep 1949
thomas jackson of london england
Made before World War I.
Resists rust better.
300 or so
Storm ruger 44 magnum 10 inch barrel What is it worth
I believe a stand barrel for the S&W model 29 is 6.5 inches. Perhaps someone changed your barrel ????
Please list EXACTLY how the barrel is marked, and if possible send a digital picture. email@example.com