Longines 19AS-401, Winding Stem

• LONGINES original part, not in factory packaging.
  

• Thread: 0.90 mm.
  

• Fits cal: 19A, 19AD, 19AS, 19ASD

Versions:

• 19A:       sub second.
• 19AD:    sub second, date.
• 19AS:    center second.
• 19ASD: center second, date.