This Automatic watch from Hamilton is intended for hobbyist divers, but looks great on land as well.
It sports water resistance to one hundred meters, which is why I say “hobbyist”. Some watches feature water resistance much deeper than that. However, it does have a ratcheting bezel and luminous hands, which come in handy while underwater.
The rest of the watch is stainless steel, save for the rubber strap. The case back features a window so you can show off the internal movement.
As far as style goes, this watch will match well in any circumstance — the elegant black face and band alongside the classy stainless steel accents will looksharp with casual wear as well as office wear.