Omega 620-1106, Winding stem

• OMEGA original part, not in original packaging.

• Thread: 0.90 MM.
  

• Fits cal: 620, 630, 670, 671, 680, 681, 682, 683, 684, 685

Versions:

• 620: N: 19800.
• 630: N: 19800, center second.