Certina 13-21, Complete movement

• 
  CERTINA complete movement in good working order, needs service.

• 
  Comes with a new winding stem.

Data:

• 
  17 jewels, manual wind.
• 
  Size: 5.75 x 6,75''' 13 x 15.25 mm.
• 
  H: = 3.55 mm.
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  N: = 19.800 A/h.
• 
  Power reserve: 43 h.

Versions:

• 
  13-20: 19.800 A/h.
• 13-21: 19.800 A/h, threads for casing clamps.
• 
  13-22: 21.600 A/h, threads for casing clamps.