Hallo friends of diver's watches,
I own a pack of nice vintage tool watches (Rolex, Blancpain, Omega, IWC, Enicar, ...), but I would never take them into salt water, after I had a bad experience with my Enicar Sherpa 600.
For many years I did wear a fake Submariner, no problem if it was sunk or stolen in South East Asia tours. Lastly it got water inside and I wouldn't give it to my trusted watchmaker.
So I looked and decided for Squale, the famed Swiss-Italian maker (squale.ch), who did supply cases to Blancpain for Bathyscaphe, FF1000 and Bund 3H and supplied some famous underwater expeditions and Italian Special Forces.
Look how the traditional design fits my wrist ( it's the Sub39 GMT version):
It was really affordable and I am sure, it will survive and in any hazard case service is available.
Konrad (on the shores of a Greek island)
And look at my fake Milsub in the Gulf of Siam:
And as we are in an Omega forum, I show my pilot line tool watches, inactive, as I dont wear them under water. I fear, even an Omega service would not garantee the water tightness, thoug also the Speedy Mk3 should take 50m.