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Geophysic

Introduced: 1958 (original), revived in 2014 and again in 2015 as the True Second and Universal Time

Purpose / Inspiration: The Geophysic was created to celebrate the International Geophysical Year of 1958, a time of scientific collaboration during the Cold War. JLC built it as a high-precision, anti-magnetic tool watch—intended for explorers, scientists, and engineers working in extreme environments. The modern revivals kept that pure, functional spirit, but added clean, dress-watch styling and even a mechanical deadbeat seconds complication.

Designer: Originally developed by JLC’s technical team for scientists and naval personnel; modern designs refined by JLC’s heritage and movement divisions

Case size:

  • Original: 35mm
  • Geophysic 1958 (2014): 38.5mm
  • Geophysic True Second & Universal Time (2015): 39.6mm–41.6mm

Case options:

  • Stainless steel
  • 18k rose gold
  • Platinum (limited editions)
  • Brushed and polished finishing with curved lugs and sapphire casebacks

Powered by:

  • Original 1958: Caliber P478/BWSbr – manual-wind, anti-magnetic, hacking seconds
  • Geophysic 1958: Automatic Caliber 898/1
  • True Second: Caliber 770 – automatic with deadbeat seconds (ticks once per second)
  • Universal Time: Caliber 772 – adds world time complication to the True Second platform
  • In-house movements with 40–42h power reserve, 28,800 vph

Bezel: Thin, polished bezel for maximum dial real estate and vintage feel

Dial options:

  • Matte white, sunburst silver, or deep blue (Universal Time)
  • Applied indices, sharp dauphine or baton hands
  • Lume dots at each hour (1958 tribute), or no lume for dressier variants
  • Globe motif on Universal Time dial

Water resistance: 50m

Bracelet:

  • Alligator leather straps with deployant clasp
  • No steel bracelet versions—clean, mid-century elegance was the goal

Discontinued, though still recent—Geophysic True Second and Universal Time models can be found pre-owned and are rising in collector interest

Why it matters: The Geophysic represents JLC at its most honest—functional, accurate, beautifully built. No flash, no gimmicks—just real watchmaking, made for people who value precision over pose. The True Second version especially stands out, showing that JLC could bring quartz-like ticking to a fully mechanical movement.

Built for Scientists. Worn by Collectors. Function-first elegance

Deadbeat Seconds = Real Mechanical Nerd Power

Not a Dive Watch. Not a Dress Watch. Just a Damn Good Watch.

Cold War Roots. Modern Movement. Geophysic Delivers.

References for Geophysic