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Certina 15-20-401, Winding stem

Certina 15-20-401, Winding stem

Tax included.
  • CERTINA original winding stem, not in factory packaging.
  • Fits cal: 15-20, 15-21, 17-211, 17-221
  • Thread: 0.90 mm.


Versions:

  • 15-20: 6.75''' 19.800 A/h.
  • 15-21: 6.75''' 21.600 A/h.
  • 17-211: 7.75''' 21.600 A/h, date.
  • 17-221: 7.75''' 21.600 A/h, date, modified balance.