Zenith 143-6

The Zenith 143-6 is based on the Excelsior Park cal: 4 with 45 min counter. Incabloc shock protection, Breguet hairspring and Glucadur balance. Manufactured in aprox: 1950.

Example movement from a 36 mm Zenith signed nickel/steele cased watch, case number: 838 782

Technical data: Zenith cal: 143-6

• 
  17 jewels, manual wind, chronograph, 60 s 30/45 min counter.
• 
  Size: 14''' 31.60 mm.
• 
  H: = 6.70 mm.
• 
  N: = 18.000 A/h.
• 
  Power reserve: 32 h.
• 
  Mainspring: 1,20 x 13 - 0,16 - 400

Versions:

• 
  143: no shock protection.
• 
  143-1-3: no shock protection, centered 24 hour counter.
• 
  143-6: incabloc shock protection, base cal: EP 4.
• 
  143-6: incabloc, 12 hour counter, base cal: EP 40.