Oris Aquis Date Calibre 400vsOris Divers Sixty‑Five Date

The Oris Aquis Date Calibre 400 is widely lauded for its exclusive in-house movement, offering a five-day power reserve, 10-year warranty, and 10-year service interval. Reviewers and owners praise its impressive accuracy, with figures ranging from under a second per day to seven seconds fast per day. The watch features a refined case with slimmer lugs and an updated dial for improved ergonomics, a patented quick-change system for straps, and a smooth, precise bezel action. Some find the dial can be shiny with glare from the domed crystal. Overall, owners and reviewers rate the Oris Aquis Date Calibre 400 highly for its significant advancements in mechanical watchmaking and value proposition.

Owners praise the Oris Divers Sixty‑Five Date for its fun color variations, comfortable strap, and slim, wearable case size. One owner notes the bezel has zero grip despite minimal backplay and perfect alignment. However, one owner experienced significant issues including the watch stopping under warranty, bracelet pin failures leading to a lost link, and internal moisture and corrosion appearing two years after a service.