I have received a revolver from either my wife's grandfather or great grandfather. Any info for this pistol would be appreciated. It is a Top Break, 32 CTG with fixed sights and a 3 1/2" barrel. The serial number is 156XXX. From the research I have so far, I think it is called a safety hammerless revolver (Lemon Squeezer). I would especially be interested to know the approximate age of the pistol. Thanks!!