Longines 340-728, Balance staff

• LONGINES original balance staff, not in factory packaging.
  

• N: = 19.800 A/h.

• Fits cal: 340, 341, 350, 351
  

Versions:

• 340: center second.
• 341: center second, date.
• 342: center second, redesign.
• 343: center second, date, redesign.
• 345: center second, date.
• 350: sub second.
• 351: sub second, date.
• 352: sub second, redesign.
• 353: sub second, date, redesign.
• 355: sub second, date, redesign.