The Omega Speedmaster is still regularly flight worn but the X-33 is the Omega watch mostly used onboard the ISS.
Curiously during the last Soyuz ferry flight, Soyuz MS04 in April 2017, none of the astronauts was wearing a watch !
Here You can clearly see a Speedy in action: at
11:38 on the left hand of the commander...
Click to expand...