Longines 420-721, Balance, complete

• LONGINES original balance, complet in very good used condition.

• Fits LONGINES cal: 420, 428
• Fits RECORD cal: 666

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.