That all depends on what kind of Smith & Wesson it is.
By the size and features
Smith & Wesson has made dozens of different revolvers chambered for the S&W.38 Special cartridge. In addition, there are hundreds of different revolvers that were not made by Smith & Weson but are marked with the exact wording from your question because they use the same ammunition. So your firearm could be: a) A cheap Saturday night special worth more as a boat anchor than as a gun. b) A custom-made one-of-a-kind worth several thousand dollars. or c) Somewhere between these extremes.
Yes
wesson. .44 calibur.
air soft pellets
38 Special and 357 Magnum
You need to have it examined by a gunsmith to be sure.
The small frame revolvers, Models 36, 37, 60, etc. were five shot and they were built upon the "J" frame. The medium caliber revolvers: Models 10, 19, 13, etc. mostly in .38 Special and .357 Magnum were built on the "K" frame. The larger guns like the Model 29, in calibers such as .44 Special, .44 Magnum, .45 Long Colt, and I believe perhaps .41 Magnum were built on the "L" frame. Hope this helps.Actually the large frame smith and Wesson revolvers are based on the N frame.this will include all model 20,21,22,23,24,25,26,27,28,29,57,and 58.This will include the pre war models of 1917,and 44 hand ejectors,and 455 hand ejectors.This will also include the new models 520,and 629.These are all N frame revolvers.
Smith & Wesson Model 29 - .44 Magnum
The Walther PPS is available in both 9x19 Parabellum, and .40 Smith & Wesson.
Needs to be examined by a good gunsmith first.