If it's a Taurus, look at the frame inside the cylinder crane. The model number will be stamped there.
6 shot .357 w/ adj. sights, maybe an older Model 66. The grip doesn't look familiar to me.
Looking at the last pic, note the hole in the frame a quarter inch or so below the rear sight. Firing pin retaining pin. Likewise, first pic, the screw at the top of the side plate. Definitely older, my late 80s vintage 66 had these, current Tauri don't.
---edit to add----
At a guess, if you examine the ejector star area, you'll see rough machining. That's typical of Taurus wheelguns. They still work.
Is it a good gun? Probably an OK gun. It is not the equal of the equivalent S&W. Two reasons I don't still have mine: It started mashing firing pin springs into uselessness, and I acquired the gun this is a copy of, a S&W Model 19. No comparison, the Smith is better, so the Taurus got traded off.
I wouldn't mind having another, if it checked out and the price was right. I assume you're evaluating this for purchase. What's he asking for it?