Anyone have a pre model 27 with 3.5 inch barrel. I picked up a nice looking revolver in .357 magnum. I could not find the model but it appears to have been made a long time ago before the model numbers were stamped on the frame. From information I have found on the web it appears to be an S prefix pre 27 model. This bad boy is built like a tank and about as heavy. Any info would be appreciated.