Oris Caliber 725

The Oris 725 is a modern automatic movement based on the Sellita SW 200-1, which itself is a clone of the ETA 2824-2. Oris heavily modifies and finishes this caliber in-house for use in their current production models.

Key Features:

• Base Movement: Sellita SW 200-1

• Type: Automatic (self-winding)

• Functions:

  • Hours, minutes, central seconds

  • Date (usually at 6 o’clock in Oris models)

• Jewels: 26

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

• Power Reserve: Around 38 hours

• Hacking seconds: Yes

• Winding: Bi-directional automatic rotor

Use in Oris Watches:

• Commonly found in Oris Aquis, Divers Sixty-Five, and Big Crown Pointer Date collections.

• Often paired with Oris’s signature red rotor.

• Known for reliable, easy-to-service performance, suitable for everyday and professional diving watches.

Comparison Summary:

Conclusion:

• The Valjoux 2438 is a vintage, highly complex chronograph movement admired by collectors for its mechanical elegance and historical use in complicated watches.

• The Oris 725 is a modern, robust automatic caliber suited for everyday wear, offering proven reliability and performance.

While they serve very different purposes and belong to different eras, both represent important aspects of Swiss mechanical watchmaking—one as a vintage collectible, the other as a reliable contemporary workhorse.