Help identifying watch

[herzog]

Hello All,

Long time lurker, first time poster - great forum full of useful/interesting information!

I inherited a Rolex/Omega watch collection from a relative, and whilst I have receipts/boxes/info regarding the majority of the pieces, I'm at a loss with one of the watches. I've taken some pictures and would be grateful if someone more knowledgeable than me (wouldn't take much) could identify it... Only thing written on it is "shock-resisting" in capitals (and Rolex obviously). There are some Hallmarks on the bracelet, but they're far too small (don't have a magnifying glass).

Apologies for poor quality photo (taken on iphone), but should hopefully be good enough for an identification.

Thanks,
Herzog