El Primero :
Chronomaster Power Reserve

42 mm

03.2080.4021/21.M2040

Opening revealing the legendary beating heart of the El Primero movement Automatic column-wheel El Primero chronograph

Movement

  • MovementEl Primero 4021, Automatic
  • Caliber13½```
    (Diameter: 30 mm)
  • Thickness7.85 mm
  • Components248
  • Jewels39
  • Frequency36,000 VpH (5 Hz)
  • Power reservemin. 50 hours
  • FinishingOscillating weight with “Côtes de Genève” pattern

Functions

    Hours and minutes in the centre

    Small seconds hand at 9 o'clock

    Power-reserve indicator at 6 o'clock
    1-counter chronograph:

    Central chronograph hand

    30-minute counter at 3 o'clock

Case, dial and hands

  • MaterialSteel
  • Diameter42 mm
  • Thickness14.05 mm
  • CrystalDomed sapphire glass with anti-reflection treatment on both sides
  • Case-backTransparent sapphire glass
  • Water-resistance10 ATM
  • Dials and countersBlack sunray
  • Hour-markersFaceted, rhodium-plated and coated with SuperLuminova SLN C1
  • HandsFaceted, rhodium-plated and coated with SuperLuminova SLN C1

Strap and clasp

  • Strap
  • Steel bracelet
    Alligator leather strap with protective rubber lining
  • Clasp
  • Steel triple folding clasp

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