Jorg Schauer of Stowa has posted some videos on how the Stowa Seatime bezel is made. The video is pretty cool.
The first video shows the bezel being laser etched. Please watch till the end as you will see some cool stuff.
The second video shows how the bezel is finished (by hand).
And finally cleaning the bezel.
A big thank you goes out to Jorg for sharing these. It is not often you get to see these.