....
Btw, Sandra has very solid rear and I know some of us would love to polish it for her...
Pfft! Sandra has a thin rear, nothing to hold on there (if you know what I mean)...
Back to watches
Here is an interesting facebook page that tries to identify watches in the media:
https://www.facebook.com/WatchIDFrom the same page, here is a cropped image of the Gravity watch:
Well for sure it's not the iconic Omega Speedmaster Moonwatch, nor does it appear to be any of the other space-watches that I'm aware of - Omega X-33, Z-33, Seiko or Fortis. It does not appear to be on a NATO or velcro strap that all the NASA space walkers use. It looks like a generic digital watch prop to me.
The movie is implausible to start with, the watch is the least of it's problems.