As far as a real pistol or a fake - the simple way to tell is to take a magnet and see if the barrel is steel. If it is steel, see if the 'touch-hole' is bored all of the way into the barrel. If the barrel is steel and the hole to ignite the charge is drilled all of the way into the rear of the barrel - the odds are pretty good that it is a real firearm.
No matter what, from what I see is that the best case scenario is that it is a replica. It isn't an antique.
That's one of those Tower reproduction's made in Turkey back in the 70's. Not only are they crude the frizzens are soft and won't spark half the time. You might get 100 bucks for it if you can find somebody that wants it bad enough.