ETA 2412-770, Mainspring

• PRIMA mainspring in factory packaging.
  

• Fits cal: 2412

Technical data ETA cal: 2412

• 17/19/21 jewels, manual wind.
• S: = 6.75''' 15.3 mm.
• H: = 3.40 mm.
• N: = 21.600 A/h.
• Power reserve: 44 h.
• Mainspring: 1,35 x 6,5 - 0,075 - 210

Versions:

• 2410: 18.000 A/h.
• 2412: 21.600 A/h.
• 2425: automatic wind, 18.000 A/h.
• 2428: automatic wind, 21.600 A/h.