Certina 25-02-770, Mainspring

• CERTINA original part in factory sealed packaging.

• Fits cal: 25-02, 25-021

Data Certina cal: 25-021 (ETA cal: 2752)

• 17 jewels, manual wind, sweep second, date, quickset.
• S: = 11.5''' 25.60 mm.
• H: = 4.0 mm.
• N: = 21.600 A/h.
• Power reserve: 50 h.

Versions:

• 25-02:
• 25-021: date.