Ironically there's a series of Russian dive watches that does approximately the same thing. Instead of attempting to overengineer a high-depth tolerant system

Ironically there's a series of Russian dive watches that does approximately the same thing. Instead of attempting to overengineer a high-depth tolerant system that's still sealed in open air, it's sealed more tightly as pressure increases. An elegant weapon from a less civilized age. https://en.m.wikipedia.org/wiki/Amfibia#Design https://en.m.wikipedia.org/wiki/Amfibia#Design