My dad was a California Highway Patrol Motorcycle Officer and before he passed on he presented me with his service revolver which is in great condition but shows holster wear for the 25 years he was with them. It is a model 28-2 and says Highway Patrol on the barrel and the barrel is 6" and colored with a Blue finish. I do not know much about this particular model and hoping someone can tell me more about it . It has three screws holding down the side plate. Dr Dave