I have a revolver passed down from my grandfather who used it as a duty weapon on the local police department. As far as I can tell, it is a Smith and Wesson .38 caliber and is marked as a CTG on the barrel. The serial number on the butt is C356XX. A friend told me that he thought it was a M&P revolver. I have attempted to find information on it and seem to have found that it was manufactured from 1948-1952 and is a C series K frame fixed sight model. Can anyone please help me? Thanks for any help.