Tudor Submariner Marine Nationale 'M.N.' Travel and the helium molecules that

and the helium molecules that had passed through the watch’s seals at depth expanded during decompression

The watch sits in a robust 42mm solid stainless steel case with thick protective lugs and a recessed crown

Watches that passed the rigorous scrutiny were dubbed Observatory Chronometers and were awarded a special Bulletin de Marche from the Observatory that tested it

the very same models issued to the Apollo-era astronauts- examples like this one

The simple

Tudor Submariner Marine Nationale 'M.N.' Travel and the helium molecules thatYou should know it by now, we LOVE our military issued watches. There is arguably no segment of vintage watch collecting with more history or romanticism. We may never know whether a given watch ever weathered active combat on the battlefield or only the inside of a homefront HQ. Either way , we know that military issued wristwatches were purpose built, tough as nails, and provided to the servicemen and women who put their lives on the line in the