Strap Oris Aquis Date, in House Calibre 400, Steel Watch,

Product Overview

The Oris Aquis Date Calibre 400 represents a significant milestone for the Swiss watchmaker—the debut of its first fully in-house automatic movement. Built within the brand’s signature Aquis dive watch platform, this 41.5mm stainless steel timepiece blends rugged functionality with refined mechanical innovation. At its heart lies the Calibre 400, a self-winding movement developed entirely by Oris to address real-world challenges faced by modern mechanical watch wearers. Rather than relying on outsourced components, Oris engineered this movement from the ground up to deliver greater reliability, reduced maintenance, and improved daily performance. The blue and silver dial enhances legibility while offering a contemporary take on classic tool watch design. This is a watch built not just for underwater exploration, but for everyday resilience—where precision, durability, and mechanical integrity matter most.

Key Features

• In-House Calibre 400 Movement – Oris’s first fully self-developed automatic movement, marking a new era of independence and engineering control. Every component is designed and manufactured by Oris, ensuring consistent quality and long-term serviceability without reliance on third-party suppliers.
• Five-Day Power Reserve – Powered by twin barrels with extended mainsprings, the watch delivers up to 120 hours of continuous operation. This extended autonomy means the watch remains accurate and ready to wear even after several days off the wrist—ideal for those who rotate between timepieces.
• Anti-Magnetic Construction – Calibre 400 is engineered to resist magnetic fields commonly encountered in modern environments. Over 30 non-ferrous and anti-magnetic components are used, including a silicon escape wheel and anchor, protecting the movement from interference caused by smartphones, laptops, and other electronic devices.
• Low-Friction Slide Bearing System – Oris replaced the traditional ball-bearing rotor system with a simplified slide bearing mechanism. A metal stud rotates within a lubricated sleeve, reducing mechanical complexity and wear. This innovation minimizes the risk of failure and enhances long-term durability by eliminating a common weak point in automatic movements.
• High Accuracy Performance – The movement is rated at -3 to +5 seconds per day, surpassing standard chronometer certification. This level of precision is maintained across various positions and conditions, ensuring dependable timekeeping in daily use.
• Classic Aquis Design Language – The watch retains the iconic elements of the Aquis collection, including a 41.5mm stainless steel case, unidirectional rotating bezel, and high-contrast dial for optimal readability. The blue dial with silver accents offers a balanced, versatile aesthetic suitable for both aquatic adventures and professional settings.

Technical Specifications

• Model Number: 01 400 7769 4135-07 8 22 09PEB
• Movement: Oris Calibre 400, in-house automatic
• Case Material: Stainless steel
• Case Diameter: 41.5mm
• Dial Color: Blue with silver accents
• Power Reserve: 120 hours (5 days)
• Accuracy: -3/+5 seconds per day
• Anti-Magnetic: Yes, via silicon components and non-ferrous materials
• Bearing System: Slide bearing (no ball bearings)
• Department: Men’s
• Date First Available: May 21, 2021
• Manufacturer: Oris Strap
• ASIN: B099SCFBMV
• Discontinued by Manufacturer: No

Benefits & Use Cases

The Oris Aquis Date Calibre 400 is engineered for real-world wear, where reliability and low maintenance are non-negotiable. Its five-day power reserve makes it exceptionally practical for individuals who don’t wear the same watch every day—whether traveling, working irregular hours, or simply rotating a collection. You can set it aside over a long weekend and return to it on Tuesday without needing to reset the time or date. The anti-magnetic properties ensure consistent performance in environments filled with electronic interference, such as offices with multiple devices, medical facilities, or near high-powered equipment. For divers and water sports enthusiasts, the Aquis foundation provides proven water resistance and a secure, functional bezel, while the robust movement construction reduces the risk of mechanical issues under pressure. The 41.5mm case size strikes a balance between presence and wearability, fitting comfortably on a wide range of wrist sizes. Whether worn during a deep dive, a commute, or a business meeting, this watch delivers mechanical sophistication without sacrificing practicality.

Important Notes

This model remains in production and is not discontinued. It is available through authorized Oris retailers and channels. Customers should refer to the official Oris warranty documentation included with the product for detailed coverage information. The watch is delivered as described, with no additional accessories mentioned in the source material. As with all mechanical watches, periodic servicing by a qualified technician is recommended to preserve optimal performance and longevity over time.