Omega 37.5 (140), Winding stem, DCN: 988

• DCN no: 988

• Thread: 1.00 mm.
  

• Fits cal: 37.5, 37.5 T1, 140, 142

• A: = 68
• B: = -
• C: = 130
• D: = 100
• F: = 688

Versions:

• 37.5 15 P: 15 jewels, 1932
• 37.5 17 P: 17 jewels, 1932
• 37.5 T1 15 P: base caliber 140, 15 jewels, 1941
• 37.5 T1 17 P: base caliber 142, 17 jewels, 1941