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

Remarks:

• Movement family:
  • Durowe 440: no date, screw balance
  • Durowe 441: no date, Nickel balance without screws
  • Durowe 443: date, screw balance
  • Durowe 445: no date, screw balance, different bridge shapes
  • Durowe 446: no date, nickel balance, different bridge shapes

• Listing ID: 21577
• Manufacturer / Brand: Durowe
• 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...: None
• Jewels: 17, 21
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Duro-Swing
• Beats per hour: 18,000
• Balance Type: Gold-plated nickel
• Power Reserve: Approx. 36 hours
• Production Period: 1956+
• Country: Germany
• Identification: Movement marked with D 441 under the balance wheel. Listed in the Flume K1 catalog in the part from 1957.
• 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-81#post-11000532