Do you see the name Smith & Weson anywhere on the revolver except in the caliber designation? The 0105 you see is probably CTGS, the abbreviation for cartridges. On true S&W revolvers, the caliber ends with the abbreciation CTG. The CTGS marking is usually found on imitation revolvers, often of Spanish or Belgian manufacture. Don't be too quick to be disappointed if this is a counterfeit. Some of the knockoff guns are of high quality and can be of collector interest in their own right. (But on the flip side, some counterfeits are not of particularly high quality and have primary utility as paperweights.)
Assuming this really is a S&W, can you give us the number off the butt of the gun? That would be the serial number.
Does this gun have an exposed hammer? Or is the hammer enclosed, making the gun double-action only? How long is the barrel, measuring from the muzzle to the face of the cylinder?
If you can post a photo, that would really help. If this is a real S&W, there are only a couple of things it could be. If it is not a S&W, then it is an imitation of one of the couple of things it would be if real.
