I just purchased the Star Chrono GMT M2M. Very pleased with the watch. I can't figure out, though, what the function of the button/lever that is found just below the top pusher is. It does not press in, but it acts like a lever if you push it up. It says "date" on it. Can anyone shed some light on this? Thanks. Below is a picture of the watch. The "date" button is just above the crown.
