Saw this ad in Esquire or GQ. I'm not sure how many speleologists and polar explorers read those magazine, but anyway-
(Sorry about the picture quality)
It's the Rolex Explorer II. Seems to go for $5000 - $6000.
I have to admit, it's a good looking watch. And I understand the appeal of owning a tough, heirloom quality watch to pass on to my son. But I don't know if I could wear something that expensive in a cave.
Either way, I let my wife know about the Rolex for speleologists.