Founded in 1904 in Hölstein, Switzerland, Oris is an independent Swiss watchmaker renowned for its commitment to mechanical watchmaking, innovation, and functional design. The Aquis collection represents Oris’s modern professional dive watch platform, while the introduction of Calibre 400 marked a major milestone with fully in-house movement technology focused on performance and long-term reliability.

The Oris Aquis Calibre 400, reference 01 400 7769 4135, features a 43.5 mm stainless steel case paired with a deep blue dial that offers excellent contrast and legibility. Bold luminous hands and applied hour markers ensure clear readability in all conditions. Powered by the in-house Oris Calibre 400 automatic movement, it delivers an exceptional 120-hour power reserve, a frequency of 28,800 vph, and enhanced resistance to magnetic fields. Functions include hours, minutes, central seconds, and a date display at 6 o’clock.

A domed sapphire crystal with anti-reflective coating on both sides provides durability and clarity, while the unidirectional rotating ceramic bezel ensures precise dive timing. With 300 meters of water resistance and a screw-down crown, the Aquis is engineered for professional diving and everyday reliability. The watch is fitted on a stainless steel bracelet with a folding clasp and integrated extension system for secure and comfortable wear.

This Oris Aquis Calibre 400 is from September 2021, is in near mint condition and comes as a full set.