Felsa 4000-721N, Balance, complete

• FELSA original balance, new in factory sealed packaging.

• Regulated with flat hairspring.

• Fits cal: 4000, 4000N, 4002, 4004, 4005, 4005N, 4006N, 4007, 4008, 4010, 4010N, 4012, 4014, 4015, 4015N, 4017, 4018

Data Felsa cal: 4000

• 17/21/25 jewels, automatic winding, sweep second.
• Size: 11.5''' 26.0 mm.
• H: = 5.6 mm.
• N: = 18.000 A/h.
• Power reserve: 43 h.

Versions:

• 4000: automatic.
• 4000N: modifications, automatic.
• 4002: automatic, date.
• 4004: modifications, automatic, date.
• 4005: automatic.
• 4005N: modifications, automatic.
• 4006N: modifications, automatic, day, date.
• 4007: automatic bridge modified, date.
• 4007N: automatic bridge modified, date.
• 
  4008: automatic, day, date.
• 4009: automatic, day, date.
• 4010: manual wind.
• 4010N: modifications, manual wind.
• 4012: manual wind, date.
• 4014: manual wind, date.
• 4015: manual wind.
• 4015N: modifications, manual wind.
• 4017: manual wind, date.
• 4017N: modifications, manual wind.
• 4018: manual wind, day, date.
• 4019: manual wind, day, date.