Felsa 390-445, Setting lever spring

• FELSA original part. NOS without factory packaging.

• Fits cal: 390, 391, 394, 395, 399, 750 -756
  

Data Felsa/AM 390

• 15/17 jewels, manual wind sub-second.
• S: = 12'''   26.6 mm.
• H: = 3.85 mm.
• N: = 18.000 A/h.
• Power reserve: 45h.
• Mainspring: 1.70 - 10.5 x 0.12 x 320