Patek Philippe 17''' 170-770, Mainspring

• PATEK PHILIPPE original mainspring in sealed packaging from the former Swedish agent.
  

• Fits cal: 17''' 170
  

• Dimensions: 1.20 x 0.16 - 535 mm.
  

Technical data PATEK PHILIPPE 17''' 170 Open face caliber.

• 18 jewels, manua wind sub second.
• S: = 17'''  38.25 mm.
• H: = 3.70 mm.
• N: = 18.000 A/h.
• Power reserve: --