Tudor GMT dual time watch.
You will need to know how to set and read a GMT watch, there are lots of videos on YouTube that show you how. Here is one of them. https//youtu.be/n54Oab-tlls
To rotate the bezel
Tap between 7 and 8 to rotate the bezel anti clockwise.
Tap between 4 and 5 to rotate the bezel clockwise.
Each tap = -/1hr.
Tap centre to zoom
Uploaded on 1 Apr 2019