Certina 13.50-401, Winding stem

• CERTINA original winding stem, not in factory packaging.
  

• Thread: 0.90 mm.

• Fits cal: 13.50

Technical data CERTINA 13.50

• 17 jewels, manual wind.
• Size: 6'''  13.5 mm.
• H: = 3.2 mm.
• N: = 21.600 A/h.
• Power reserve: 40 h.
• Mainspring: 1.20 x 5.0 - 0.06 mm.

Versions:

• 13-50:      base caliber.
• 13-51:      back winding.