Longines 13.15-770, Mainspring

• LONGINES original mainspring in factory packaging.
  

• Fits cal: 13.15, 4LL
  

Technical data LONGINES 13.15V

• 17 jewels, manual wind.
• S: = 5.75 x 6.75'''   13.0 x 15.3 mm.
• H: = 3.40 mm.
• N: = 19.800 A/h.
• Power reserve: 36 h.
• Mainspring: 1.35 x 5 - 0.06 - 160 BA = Double brace.

Versions:

• 4LL:        no shock protection, 18.000 A/h.
• 4LLV:      no shock protection, 19.800 A/h.
• 13.15:     incabloc, 18.000 A/h.
• 13.15V:   incablock, 19.800 A/h.