Leadslinger83:
I think you have a bitsa. Specifically it is a .38 Military & Police Model of 1905 3rd Change manufactured between 1909 & 1915 in the serial range 146900 to 241703.
The grips, if walnut, are from the period 1946 to 1950.
The Pat. dates are for the .38 Military & Model of 1905 4th Change. Look on the underside of the barrel. Hidden by the ejector rod there should be a serial number with a B prefix. If the barrel is original to the gun then it will be B209936 & your gun definitely dates to 1915.
If the number is different or missing then it has been rebarreled at some point. This is not uncommon, S&W did not heat treat these guns, so the odd one would bulge a barrel or cylinder.
If not original then all I can say is 1909 to 1915.
Now for the warnings.
Because this gun was not heat treated I recommmend that you only fire it if it passes the how to check out a revolver sticky at the top of this subforum.
In addition only use lead standard velocity ammunition. No +P, +P+, jacketed or semi jacketed ammo. This will reduce the likelyhood of a bulged barrel or cylinder.
This gun lacks a positive internal hammer block. If dropped it could fire. So load five only and leave the chamber under the hammer empty.