IWC 83, Winding stem, no: 401

• NOS IWC original part. Not in factory packaging.

• Thread: 0.90 MM.
  

• Fits cal: 83

Data IWC cal: 83

• 15/16 jewels, manual wind, sub second.
• Size: 12''' 26,50 mm.
• H: = 4,10 mm.
• N: = 18.000 A/h.
• Power reserve: