Question! Are Model 27 & 28's stamped with a number designation or are there some that are not? This is kind of like answering my own question as My Highway Patrol Model does not have a Model number. It also does not have a frame size ( such as N, L, K, ) stamped on the frame anywhere or on the grip frame. I also have a S&W 44 mag 4 screw stamped only S&W 44 Magnum it is not a Model 29, I think it is known as a pre Model 29. On the left side of the grip frame at the bottom it is stamped ( R-N ) and those are the only Letters that I can find on the frame.