Oris Aquis Date Calibre 400 Back to the manufactureīy 1981, the horology house, founded back in 1904 in Hölstein near Basel, had developed around 280 of its own calibres. However, it is well worth noting that this is by no means the first time that Oris has produced a movement in-house. The new Aquis Date Calibre 400 is even available for less than 3,000 Euros, when purchased with the rubber strap. To answer the former question: in keeping with the company motto of providing high quality at a reasonable price. To answer the latter question, it is the icon of modern diving watches – at least for die-hard Oris fans – the aptly named and ever-popular Aquis. Oris could have leveraged the antimagnetic features and improved the rotor efficiency and still given us something like a 60-80 hour power reserve and we would have been GLOWING.People seemed particularly keen to predict which price segment Oris was likely to fall into with the new calibre, and also, to guess which watch would the calibre first be featured? Now, at last, the secret is out. I would have liked a less expensive Oris Aquis to roll out with something akin to the new LJP G100 movement, eliminating the danger zone when changing the date after 9PM, no worries of over winding and a very efficient winding mechanism while 8 beats and keeping a 68hour power reserve.

On the wrist it just felt like every other Oris Aquis despite the neat toolless bracelet and slightly better detailed dials.

I also noticed when testing the full 5-DAY power reserve the movement would start to gain time more rapidly +5 and more when the reserve was diminishing. I was able to replicate the hand jump after not skipping past my desired time and back rather repeatedly.

In the end I sold it off, was still deciding if I liked the 41.5MM over the 43.5MM after owning the 39.5MM as well. It also appeared the date would flip over at midnight more crisply and time keeping (manually wound 200 times and worn), was +2 seconds day. To the point, I picked up a 41.5MM Oris Aquis Anthracite, enjoyed looking at the very industrial movement and felt the crown action was very smooth. After reading many Oris Cal 400 posts I decided I had something to add.

Oris calibre 400 issues