Omega 550-1321, Balance staff, 3 pcs

• OMEGA original balance staff, 3 pcs in factory packaging.

• Fits cal: 550, 551, 552, 560, 561, 562, 563, 564, 565, 600, 601, 602, 610, 611, 613, 750, 751, 752

Versions without date:

• 550: 17 jewels.
• 551: 24 jewels, chronometer.
• 552: 24 jewels.

Versions with date:

• 560: 17 jewels.
• 561: 24 jewels, chronometer.
• 562: 24 jewels.
• 563: 24 jewels, quick set date.
• 564: 24 jewels, quick set date, chronometer.
• 565: 24 jewels, quick set date.
• 750: 17 jewels, day, date.
• 751: 24 jewels, day, date, chronometer.
• 752: 24 jewels, day, date.

Versions with manual wind:

• 600: 17 jewels, swan neck regulator.
• 601: 17 jewels, exenter regulator.
• 602: 17 jewels, chronometer.
• 610: 17 jewels, swan neck regulator, date.
• 611: 17 jewels, exenter regulator, date.
• 613: 17 jewels, quickset date.