El Primero :
Chronomaster Grande Date

45 mm

51.2161.4047/75.C713

Opening revealing the legendary beating heart of the El Primero movement Automatic column-wheel El Primero chronograph Lever and lever wheel in silicon

Movement

  • MovementEl Primero 4047, automatic
  • Caliber13 ½```
    (diameter: 30.50 mm)
  • Thickness9.05 mm
  • Components332
  • Jewels32
  • Frequency36,000 VpH (5 Hz)
  • Power reservemin. 50 hours
  • FinishingOscillating weight with “Côtes de Genève” pattern

Functions

    Hours and minutes in the center
    Small seconds hand at 9 o'clock
    Large date at 2 o'clock
    Moon & sunphase indicator at 6 o'clock
    Chronograph:
    Central seconds hand
    30-minute counter at 3 o'clock
    Tachometric scale

Case, dial and hands

  • MaterialRose gold and steel
  • Diameter45 mm
  • Thickness15,60 mm
  • CrystalDomed sapphire glass with anti-reflection treatment on both sides
  • Case-backTransparent sapphire glass
  • Water-resistance5 ATM
  • Dials and countersBrown sunray
  • Hour-markersGold-plated, rhodium-plated, faceted and coated with SuperLuminova SLN C1
  • HandsGold-plated, rhodium-plated, faceted and coated with SuperLuminova SLN C1

Strap and clasp

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

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