11 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Movement family:
  Differences not known, maybe different bridge shapes.
  • Aurore-Villeret 4200
  • Aurore-Villeret 4201
  • Aurore-Villeret 4205
  • Aurore-Villeret 4206
  • Aurore-Villeret 4207

• Listing ID: 18032
• Manufacturer / Brand: Aurore-Villeret
• Caliber: 4201
• Size in French Lignes: 11 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Holes in setting lever spring or rocking bar: 4
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 42 hours
• Production Period: Unknown, probably around 1962
• Country: Switzerland
• Identification: Movement marked with AV and 4201 under the balance wheel. Listed in the Flume K2 catalog from 1962.
• Contributor ©: Uhrforum.de member buchenhain
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-76#post-10490068