11 1/2”’ | Electro Mechanical Balance | Sweeping Seconds |

Remarks:

• Sweeping seconds with hacking

 

• Listing ID: 3489
• Manufacturer / Brand: Landeron
• Caliber: 4751
• Size: 11 1/2'''
• Shape: Round
• Winding: Battery
• Hand Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: None
• Jewels: 13
• Setting Lever Screw/Pin Position: Center
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Mono-/Bimetallic screw balance with Breguet hairspring | Glucydur | Nickel | Brass
• Power Reserve: Unknown
• Production Period: Around 1960
• Identification: Original data sheet from 1963 available.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-24#post-3464853
• Country: Switzerland
• Contributor ©: Uhrforum.de member JackDaniels83