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Excalibur 42

Chronograph with micro-rotor

Excalibur 42

Chronograph with micro-rotor

Excalibur 42

Automatic with micro-rotor

The dynamic design of this chronograph model is enhanced by the optimal legibility of its useful indications, with small seconds in a counter at 9 o’clock, a 30‑minute chronograph counter at 3 o’clock featuring a blue pointer matching the central sweep‑seconds chronograph hand, as well as a date appearing at 6 o’clock.


  • RD681 Automatic chronograph calibre with date
  • Self-winding mechanical calibre
  • Power reserve: 52 hours
  • Case: 42mm, Stainless steel
  • Stamped with the Poinçon de Genève
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Poinçon de Genève

The ultimate guarantee of the finest traditional watchmaking. Roger Dubuis makes it a priority, when producing this timepiece, to follow only the most demanding & strictest criteria for quality and craftsmanship.

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Automatic chronograph calibre with date

The signature of the most sophisticated mechanisms

About this calibre

Technical specifications

Inner & Outer casing

  • Reference RDDBEX0388
  • Case size: 42mm
  • Case: Stainless steel
  • Dial: Silver satin sunburst
  • Water Resistance: 3 BAR (30 m)

Strap & Clasp

  • Strap: Mahogany Brown, genuine alligator
  • Clasp: Folding clasp in stainless steel


  • Automatic chronograph calibre with date
  • Power reserve: 52 hours
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