When my father passed away, he left me a blue revolver. The markings on the barrel are 38 S&W CTG. It is a 5 shot revolver with serial number 254391 on the bottom of the butt. The barrel is 3-1/4" long (from front of the cylinder to the end). It has a top break to load, and what look like walnut grips. I would like to find out the approximate age of the gun, as well as what it might be worth. It is in extremely good condition.