Vintage Omega Seamaster Chrono‑Quartz 1976 ST 396.0839

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The Omega Seamaster Chrono-Quartz ref. ST 396.0839 (1976) is one of the most fascinating and technically ambitious watches Omega ever made—a true hybrid of mechanical-style chronograph layout with early quartz innovation.


 Basic Specs

  • Reference: ST 396.0839
  • Year: Introduced 1976
  • Movement: Omega Caliber 1611 (Chrono-Quartz)
  • Case Size: ~38–40mm (tonneau/barrel-shaped)
  • Case Material: Stainless steel
  • Crystal: Mineral glass
  • Water Resistance: Originally ~120m (Seamaster-rated)

 Movement – Caliber 1611

This is what makes the watch special.

  • Developed with Lemania (Omega’s sister company)
  • Hybrid quartz chronograph
  • Separate gear trains:
    • Analog timekeeping (quartz-regulated)
    • Mechanical-style chronograph module
  • Frequency: 32 kHz quartz oscillator
  • Chronograph resolution: 1/100th of a second
  • Display:
    • Analog time (center hands)
    • Digital LCD for chronograph (top window)
  • Battery-powered, but far more complex than standard quartz

It was one of the first analog-digital chronographs ever made.




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