Heuer 12-734, Hairspring for balance

• HEUER original hairspring for balance in very good used condition.

• Fits Heuer cal: 12, 14, 15 (21.600 A/h)

Versions: Heuer

• 11: N: = 19800.
• 12: N: = 21600.
• 14: as cal: 12 with 24h GMT.
• 15: as cal: 12, sub second instead of 12 h counter.