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