The Oris Caliber 331 is part of Oris’s collection of automatic mechanical movements, typically based on Swiss-made ebauches such as the Sellita SW 200 series. This caliber is customized and refined by Oris to meet the brand’s standards for quality, reliability, and precision.

Key Features of Oris Caliber 331

• Based on: Sellita SW 200-1

• Type: Automatic (self-winding)

• Functions:

  • Hours, minutes, central seconds

  • Date display

• Jewels: Approximately 26

• Frequency: 28,800 vibrations per hour (4 Hz)

• Power Reserve: Around 38 hours

• Features:

  • Hacking seconds for precise time setting

  • Bi-directional automatic winding

  • Date window typically located at 6 or 3 o’clock depending on watch design

• Usage: Found in Oris watches that blend classic design elements with reliable daily mechanical performance.

General Information

• The movement operates at 28,800 vph, ensuring smooth motion of the seconds hand and accurate timekeeping.

• Power reserve of approximately 38 hours provides practical autonomy for daily wear.

• The hacking seconds function allows users to stop the seconds hand for exact time synchronization.

• Oris applies finishing and quality control measures to ensure durability and consistent performance, often featuring the brand’s signature red rotor visible through sapphire case backs.

• Thanks to its Sellita base, the caliber benefits from good availability of parts and straightforward servicing.

Conclusion

The Oris Caliber 331 is a dependable automatic movement that exemplifies Oris’s approach to combining trusted Swiss mechanical foundations with in-house refinements. It offers smooth operation, practical date functionality, and reliable accuracy, making it a suitable choice for a variety of Oris watches designed for everyday use and classic style.