11 1/2”’ | Automatic | Swiss Lever | Direct Sweeping Seconds |

Remarks:

• Movement family:
  • Felsa 4000: automatic, no date
  • Felsa 4002 / 4003 / 4004: automatic, date, differences not known
  • Felsa 4005: automatic, no date, no seconds
  • Felsa 4006 / 4008 / 4009: automatic, date, day, differences not known
  • Felsa 4010: hand winding, no date
  • Felsa 4012 / 4013 / 4014: hand winding, date, differences not known
  • Felsa 4015: hand winding, no date, no seconds
  • Felsa 4016 / 4018 / 4019: hand winding, date, day, differences not known
• Suffix N: modified movement, changes unknown

• Listing ID: 12112
• Manufacturer / Brand: Felsa
• Caliber: 4000
• Size in French Lignes: 11 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 30
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 44 hours
• Production Period: Unknown, probably around 1955
• Country: Switzerland
• Identification: Movement marked with Felsa logo and 4000 on the base plate. Listed in the "Official Catalogue of genuine Swiss Watch repair parts" from 1955.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)