Patek Philippe 13.5-320, Winding stem, no: 401

• PATEK PHILIPPE original stem, not in factory packaging.
  

• Thread: 0.80 mm.
  

• Fits cal: 13.5-320, 13.5-320PM

Data Patek Philippe cal: 13.5-320

• 20 jewels, manual wind, hour and minute display.
• S: = 13.5 mm.
• H: = 3.20 mm.
• N: = 21.600 A/h.
• Power reserve:
• Mainspring: Height: 1.20 mm, Length: 155 mm.