I inherited a few S&W Revolvers from my father. Model 36, 12-2 (appears NIB), 10-5, 15-4 and one I am not sure of. It is a 44 magnum, no model number, S169xxx, 4 screws, nickel plated, 4 inch barrel. I assume a pre model 29? As new to the world of S&W, is this a nice one to have in a...