This is the original NASA Apollo Moon Launch watch that beat all other brands in competition for that honor. If you saw the movie or read the book Apollo XIII it was used to time the firing of the rock engines to return to earth. This was the original but there is an upgraded version lauding it's use. I have one of the originals like this one and wear it about 70% of the time. It stands out in that it's diameter is so large.
A pre-Baselworld delight comes in the form of the Omega Speedmaster Moonwatch Automatic Master Chronometer. So many awesome OMEGA Watches released this week! Full details by Zen Love are up now: www.ablogtowatch.com/omega-speedmaster-moonwatch-automatic-master-chronometer-watch/