I stumbled upon the Lip Nautic-Ski. A super-compressor case with an electronic movement. The watch is from the 50s, 60s and was quite 'big' in Europe. Lip was a fine French manufacturer btw.
A little larger perhaps, 40, 41mm. 20mm lugs and perhaps a quartz movement or something along the Citizen solar-powered route would be great as well. I even have a name for it: Utah. As far as I know, the only place where you can ski and dive during the same holiday! (Correct me when I'm wrong