Is the Oris Divers Sixty-Five 40mm a good dive watch?

It is a genuine dive watch with water resistance and a unidirectional bezel, but its rating suits recreational diving rather than deep technical dives. For most swimmers and casual divers it is more than enough.

Does it need a battery?

No. It uses a Swiss automatic mechanical movement that winds itself as you wear it. If you leave it off for a few days it will stop, and you reset and wind it by hand.

How does the 40mm size wear?

The 40mm case is mid-sized and fits most wrists, including smaller ones, without the bulk of larger 42mm or 44mm dive watches. Try it on if you can, since lug shape affects fit.

What is a fair price for it?

The best new price found is $1,600 at WatchMaxx.com as of November 7, 2026. With only one new listing, compare against used and gray-market prices before buying.

How often does it need servicing?

Oris generally recommends servicing an automatic movement every few years of regular wear. Budget for that cost when comparing it with cheaper quartz watches.