The Oris Aquis has a case shape that is rather unique, of course. This watch is no different when it comes to those features. A uni-directional bezel, 300 meters of water resistance, screw-down crown, screw case back, and a very legible dial.

What they all have in common are the typical features for diving purposes. From all sorts of brands and in all sorts of price ranges. I am not a diver, but I do have and have had my share of divers watches. And here it is, the Oris Aquis Calibre 400. It is interesting that Oris decided to introduce the movement first, and a few weeks later introduce the first watch to be powered by it. If you’re a watch fanatic, you haven’t missed the introduction of the new Oris movement: Calibre 400. That watch was a bit smaller, and there are some aesthetic differences, but it just reminded me of that one. The dial (and watch) look quite similar to their Aquis Ocean Cleanup limited edition. I know it should be all about the in-house caliber 400, but I’ll tell you that it took a few minutes before taking the watch off again to have a glance at the new Oris movement. This is the new standard.Funny, when I unboxed this new Oris Aquis Calibre 400 for this review, I couldn’t stop looking at the dial.

This means that barring accidental damage or waterresistance checks, you shouldn’t need to bring in a Calibre 400 watch for a service until 2030 at the earliest. In addition, Oris is also proposing 10-year recommended service intervals on Calibre 400 watches. Oris is so confident in the performance of the advanced technologies integrated into Calibre 400 that we are offering a 10-year warranty on all Oris watches powered by the new movement when you register them at MyOris. It delivers this longer period of use via twin barrels, both of which house an extended mainspring, each long enough to store two-and-a-half days of power. Calibre 400 has a five-day power reserve, so it’ll still be running if you’ve not worn your watch between, say, Thursday and Tuesday. If you put a standard mechanical watch down for a day or two, it will stop as the power reserve runs down. When conceptualising Calibre 400, Oris’s engineers recognised that these days we may not wear the same watch every day. It has a five-day power reserve (120 hours), is highly resistant to magnetism, and comes with 10-year recommended service intervals and a 10-year warranty. Calibre 400 is an entirely new movement, independently conceived by Oris, and sets the new standard for automatic mechanical movements.

Oris calibre 400 problems