Welcome to the forum. Open the cylinder and look at the crane. The model will be stamped there. If you give us the Caliber which is found on barrel (couldn’t read it in the picture) and serial number which is found on the butt and we can tell you the year it left the factory.
Hello and welcome to the forum. As others have stated, that is a very high condition Model 19. It is pinned and recessed which dates it earlier than the early 1980's. If you give us the serial number from the bottom of the grip frame, we can give you a pretty close answer as to when it left the factory. The model 19 is a K frame revolver. Blued steel. The K frame is their medium frame size. The short barrel and rounded grip frame made concealed carry with these revolvers a little easier to accomplish. It will handle any factory .357 ammo you like but don't feed it a ton of low weight magnum loads. (110-125 grains). stick with 135 and up. You can also shoot 38 Special ammo from it but if you do, make sure to clean the cylinder very well so you don't get carbon build up that makes chambering .357s difficult.