Zenith 40T

Data: Zenith cal: 40.T

• 
  17 jewels, manual wind, sub second.
• 
  Size: 12''' 26.75 mm.
• 
  H: = 3.80 mm.
• 
  N: = 18000.
• 
  Power reserve: 45 h.
• 
  Mainspring: 1.55 X 10.5 - 0.105 - 380

Versions:

• 
  40: 1955 - 1960
• 
  40T: 1958 - 1963