El Primero :
Stratos Flyback

45 mm


Zenith military chronograph legacy Automatic El Primero column-wheel chronograph with flyback function


  • MovementEl Primero 405 B, Automatic
  • Calibre13¼``` (Diameter: 30 mm)
  • Thickness6.60 mm
  • Components331
  • Jewels31
  • Frequency36,000 VpH (5 Hz)
  • Power reservemin. 50 hours
  • FinishingOscillating weight with “Côtes de Genève” motif


    Three-counter chronograph with flyback function
    - Central chronograph hand
    - 12-hour counter at 6 o'clock
    - 30-minute counter at 3 o'clock
    Hours and minutes in the centre
    Small seconds at 9 o'clock
    Telemetric scale
    Date indication at 6 o'clock

Case, dial and hands

  • MaterialStainless steel with rose gold crown and pushpieces Unidirectional rotating bezel with rose gold disc
  • Diameter45 mm
  • Thickness14.10 mm
  • CrystalDomed sapphire crystal with anti-reflective treatment on both sides
  • Case-backTransparent sapphire crystal
  • Water-resistance10 ATM
  • Dials and countersBrown sunray-patterned
  • Hour-markersGold-plated, faceted and coated with SuperLuminova SLN C1
  • HandsGold-plated, faceted and coated with SuperLuminova SLN C1

Strap and clasp

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