Omega 470-1106, Winding stem

• OMEGA original winding stem, not in factory packaging.

• Thraed: 0.90 mm.
  

• Fits cal: 470, 471, 490
  

• 470: 17 jewels (1955).
• 471: 19/20 jewels (1955).

Versions: 28.00 mm.

• 490: 17 jewels, sub second (1956).
• 491: 19 jewels, sub second (1956).
• 500: 17 jewels, center second (1956).
• 501: 20 jewels, center second (1956).
• 502: 17 jewels, center second, date (1956).
• 503: 19/20 jewels, center second, date (1956).
• 504: 24 jewels, center second, date, chronometer (1957).
• 505: 24 jewels, center second, chronometer (1957).