Certina 17.10-401, Winding stem

• CERTINA original stem, not in factory packaging.
  

• Thread: 0.90 mm.

• Fits cal: 17.10, 17.11, 17.12, 350, 351

Versions, Manual wind:

• 17-10:   18.000 A/h, manual wind, sub second.
• 17-11:   18.000 A/h, manual wind, sub second, maunting flanges on plate.
• 17-12:   19.800 A/h, manual wind
• 17-25:   19.800 A/h, manual wind, sweep second.
  
• 17-251: 19.800 A/h, manual wind, sweep second, date.