Tested on GW4 46mm and GW4 42 mm, on dialer position 4 is recent app manager. I did it for myself because I like Certina DS very much.
Maybe someone else can enjoy too.
Install via Watch Face Studio.
On watch enable developers options.
Turn on ADB debugging and Debug over Wifi.
Open file in WFS /Watch Face Studio/ . Press Run on device button.
+ button and enter IP of your watch/it is shown under Dubug over Wifi option or Wifi setting on your watch/
In the list you will see your watch, press it and wait few seconds.
https://www.mediafire.com/file/7miamovs179rq8e/certina2.wfs/file
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