Longines 340-401, Winding stem

• LONGINES original winding stem, not in factory packaging.
  

• Thread: 0.90 mm.
  

• Fits cal: 340, 341, 342, 343, 345, 350, 351, 352, 353, 355

Versions:

• 340: center second.
• 341: center second, date.
• 342: center second, redesign.
• 343: center second, date, redesign.
• 345: center second, date.
• 350: sub second.
• 351: sub second, date.
• 352: sub second, redesign.
• 353: sub second, date, redesign.
• 355: sub second, date, redesign.