Monochrome Watches
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The Oris Aquis Date Calibre 400 41.5mm Collection

Smaller and more power under the hood!

| By Brice Goulard | 3 min read |
Oris Aquis Date Calibre 400 41.5mm Collection 2021

The Aquis is, without doubt, one of the most accomplished and acclaimed collections by Oris. A modern, robust and well-equipped dive watch, it has long been available with an outsourced automatic movement by Sellita. Yet, Oris had different plans and recently introduced a manufacture movement to offer watch enthusiasts more power, higher accuracy, more reliability and magnetic resistance. This engine, the Calibre 400, was first introduced in late 2020 into the larger 43.5mm edition of the Aquis. And now, for 2021, it finds its way in a more compact edition of this watch inside the Aquis Date Calibre 400 41.5mm Collection, in three different colours.

At first, not much appears to have changed with these new models. The Aquis Date remains almost identical visually. A watch that has been in the collection for many years, it was revamped in 2017 with a slightly more refined and modernised design. Originally offered in a relatively large case of 43.5mm, followed by a 39.5mm edition, last year, the brand from Holstein decided to add an intermediate size, with a 41.5mm diameter – a size that will fit most wrists.

Oris Aquis Date Calibre 400 41.5mm Collection 2021

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Design-wise, not much has changed, and even though there’s a mechanical upgrade, the new Aquis Date Calibre 400 41.5mm watches retain all the elements that have contributed to the success of this collection. The case, with brushed surfaces and polished accents, has a contemporary and robust flair, with angular shapes and strong lugs. It maintains its comfortable 300m water-resistance and comes equipped with a screw-in crown, sapphire crystals on both sides and crown guards.

Oris Aquis Date Calibre 400 41.5mm Collection 2021

The new Calibre 400 41.5mm Collection is presented in three different tastes. The sunray-brushed dial, as well as the polished ceramic insert of the unidirectional bezel, are available either in dark blue, green or anthracite. The large hands and applied hours markers are all filled with white Super-LumiNova for enhanced contrast day and night. Finally, a date is positioned at 6 o’clock and printed on a disc matching the colour of the dial.

All three colourways are available on a 3-link, brushed and polished stainless steel bracelet or a black rubber strap. Either way, both options are equipped with a security folding clasp with diver’s extension, as well as Oris’ Quick Strap Change system allowing to swap between strap and bracelet without tool.

Oris Aquis Date Calibre 400 41.5mm Collection 2021

Under the see-through sapphire caseback is the brand’s new standard automatic movement. The large, powerful Calibre 400 is equipped with two barrels offering a robust 120-hour or 5-day power reserve. Beating at 4Hz, its regulating organ uses silicon for the anchor and escape wheel, along with non-ferrous material for the axes, escape wheel and anchor. Thus, the impact of magnetic fields on the movement is reduced by more than 90%. The movement is regulated within a -3/+5 seconds a day range (within COSC standards) and comes with a 10-year warranty and 10-year recommended service intervals.

Availability & Price

All six references (3 colours, with 2 strap/bracelet options) of the Oris Aquis Date Calibre 400 41.5mm are now available for orders at the brand’s website or retailers. Prices will be CHF 3,100 or EUR 2,900 on a rubber strap and CHF 3,200 or EUR 3,000 on a steel bracelet.

For more details and orders, please visit

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