I just received this in the mail today. I can't seem to find much information online. I believe it is a very early Seamaster chronograph. 32mm in diameter! The letters on the snap back case are very faded, but still visible: It carries a very clean 321 movement. The watch is claimed to be waterproof. You'll notice the application of a washer across the inner edge of the back: The watch is very difficult to photograph and I've yet to be successful. Perhaps my brother can take better pictures. What are your thoughts on it? Could you shed some light on the model and its place in the Seamaster line?