Monochrome Watches
An online magazine dedicated to fine watches

The New Oris AquisPro Date Calibre 400

The professional Oris diver changes name and gets the brand's in-house movement.

| By Brice Goulard | 3 min read |

Oris is no stranger to the dive watch. It actually offers multiple sub-collections focused on aquatic activities yet with different users in mind. The Divers Sixty Five is the cool, vintagey option, and the Aquis is a solid contender for the modern daily diver’s watch. At the top-end of the diving watch collection is the ProDiver collection with ultra-functional, instrumental and rugged models. It seems that Oris’ high-performance diver is changing its name to become the AquisPro, and coincidentally it now features the brand’s recently introduced manufacture movement. Here the new Oris AquisPro Date Calibre 400.

If the name isn’t the same, the new AquisPro is completely in line with what the previous ProDiver stood for: a highly technical tool watch to serve professional divers on saturation dives equipped with ultra-resistant materials and various functionalities created with professionals in mind. And, looking at the watch, it shows. Don’t expect elegance and compact proportions; the Oris AquisPro isn’t meant for the city.

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Just like the ProDiver before, the new Oris AquisPro Date Calibre 400 is a large watch – to say the least. It has a mighty 49.50mm diameter. The brand has worked on the case to maintain a slight idea of ergonomy with very short lugs that will help make the watch a bit more usable. This hefty size is compensated by lightweight titanium for the case, which will also provide additional resistance and anti-corrosion properties. The case, the caseback and the crown are all coated with black DLC. The result is a watch with a water-resistance rating of 1,000m.

One of the classic features of the collection was the patented Rotation Safety System, known as RSS, which has been reintroduced. As such, this new Oris AquisPro Date enables the wearer to adjust and lock the unidirectional rotating bezel – which is made of ceramic with a white and yellow 60-minute scale – into place, making sure that the remaining dive time can be read with absolute certainty. This RSS device is operated thanks to a chunky rubber grip, making it easy to use with wet gloves.

The dial has been updated for this new AquisPro collection and shares some of its design cues with the classic Aquis watches, with identically shaped hands and indexes. The dial retains the distinctive wave pattern previously found on the ProDiver. White Super-LumiNova ensures great contrast day and night.

The new AquisPro Date is worn on an integrated rubber strap, equipped with a Sliding Sledge extension system – for fine adjustment – and the Oris Safety Anchor device, developed by the brand so that in the event the clasp is released unintentionally, two hooks grab the strap so the watch stays attached to the wearer’s wrist.

Last but not least, this new model benefits from the brand’s recently presented manufacture movement, the calibre 400. Developed with pragmatism in mind, this powerful automatic engine is equipped with two barrels for 5 days of power reserve. It also comes with an anti-magnetic silicon escape wheel and anchor and accuracy within chronometer levels. Its rotor is placed on a more reliable, low-friction, slide-bearing system that only winds in one direction. Oris offers a 10-year warranty and 10-year recommended service intervals.

Availability & Price

The Oris AquisPro Date Calibre 400 is now available from retailers (April 2021) as part of the permanent collection. It will be priced at CHF 4,200.

More details at

1 response

  1. A bit of a Seiko Tuna copy from certain angles, but overall I quite like it. Way better looking that the previous Aquis iterations.

    I like that Oris are backing their movement with 10yr warranty/service. More manufacturers need to do that. Also like the caseback (saw a close-up on another site) and the Tri-point/Y-type screw motif which also appears to extend to the bars holding the strap.

    Only complaints would be the unnecessary date window (as usual) and the whole “Rotation Safety System, Blah Blah” thing on the side. Oh, and the Formula 1 backmarker thing….

    Pricey, but nice. Sadly, I don’t have the wrists to make this work for me.

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