Longines 420-440, Spring for yoke

• LONGINES original part, new without factory packaging.
  

• Fits cal: 420, 428, 846, 847

Data: Longines cal: 420 (Record cal: 666).

• 17 jewels, manual wind, sub second.
• Size: 10.5'''  23.30 mm.
• H: = 2.50 mm.
• N: = 21.600 A/h.
• Power reserve: 40 h.

Version:

• 420:    sub second.
• 428:    no second.
• 846:    micrometic regulator, sub second.
• 847:    micrometic regulator, no second.