A friend on mine (same guy I posted about before with info about Rolex Milsubs) said he dug out his old Benrus. It was issued to him when he was on SEAL team 2 back in the 70s.
I'll try to get some pics eventually, and if his sons don't want it, I have already told him I want to buy it.
It's like the watch in the photos at this link...
Benrus Type I Class A Military Dive Watch