10 1/2”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Rocking bar winding
• Quick date setting by repeatedly changing 22:30 – 24 o’clock
• Movement family:
  • Otero 44: no date, fixed hairspring stud-holder, ratchet wheel and click on the dial side
  • Otero 45: no date, fixed hairspring stud-holder, ratchet wheel and click on the bridge side
  • Otero 441: date, fixed hairspring stud-holder
  • Otero 144: no date, new balance, mobile hairspring stud-holder
  • Otero 1441: date, new balance, mobile hairspring stud-holder

• Listing ID: 13716
• Manufacturer / Brand: Otero
• Caliber: 441
• Size in French Lignes: 10 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Trishock
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 45 hours
• Production Period: Unknown, probably around 1956
• Country: Germany
• Identification: Movement marked with Otero logo and 44 (base movement). Listed in the Flume K1 catalog in the part from 1957. Listed in the magazine "Die Uhr" 22/1956.
• 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-73#post-10103100