El Primero:
Chronomaster Power Reserve

42 mm


Opening revealing the legendary beating heart of the El Primero movement
Silicon escape-wheel and lever
Automatic El Primero column-wheel chronograph
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Variations 1/6
  • MovementEl Primero 4021, Automatic
  • Calibre13¼``` (Diameter: 30 mm)
  • Thickness7.85 mm
  • Components248
  • Jewels39
  • Frequency36,000 VpH (5 Hz)
  • Power reservemin. 50 hours
  • FinishingOscillating weight with “Côtes de Genève” motif
    - Central chronograph hand
    - 30-minute counter at 3 o'clock
    Tachymetric scale
    Hours and minutes in the centre
    Small seconds at 9 o'clock
    Power-reserve indication at 6 o'clock
  • MaterialRose gold and stainless steel
  • Diameter42 mm
  • Thickness14.05 mm
  • CrystalDomed sapphire crystal with anti-reflective treatment on both sides
  • Case-backTransparent sapphire crystal
  • Water-resistance10 ATM
  • DialSilver-toned sunray-patterned
  • Hour-markersGold-plated, faceted and coated with SuperLuminova SLN C1
  • HandsGold-plated or blued, faceted and coated with SuperLuminova SLN C1
  • Strap
  • Brown alligator leather strap with protective rubber lining
  • Clasp
  • Stainless steel triple folding clasp
  • Felix Baumgartner Red Bull Stratos Mission

    Felix Baumgartner

    Breaking the sound barrier

    The El Primero Stratos Flyback Striking 10th chronograph breaks the sound barrier on the edge of space, solidly fastened to Felix Baumgartner's wrist.

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  • watch movements complications


    More than 600 variations

    The brand possesses an impressive legacy of more than 600 variations on movements entirely designed and produced within its manufacture.

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