Landeron 51

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13 3/4”’ | Hand Wind | Swiss Lever | Small Seconds | Chronograph |

Remarks:

  • Chronograph cam-actuated: central chronograph seconds, 30 min counter at 3 H
  • Button at 2H: Start, Button at 4H: Stop/Zero setting
  • Movement also available with 45 min counter
  • There are two generations of the Landeron 51 with several different parts (see extra picture):
    • 1st gen: 1947 – approx. 1950
    • 2nd gen: 1950+
    • The movement shown here is a 2nd gen.

 

  • Listing ID: 7142
  • Manufacturer / Brand: Landeron
  • Caliber: 51
  • Size in French Lignes: 13 3/4''', height 6.22 mm
  • Size range mm largest diameter: 31 - 40 mm
  • Shape: Round
  • Winding: Manual (Crown)
  • Hands Setting: Crown
  • Seconds Hand: Small seconds
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date, Day, Month...: None
  • Other Functions: Chronograph
  • Jewels: 17
  • Setting Lever Screw/Pin Position: Right
  • Balance Position: Right (0 - 120°)
  • Shock Protection: None, Incabloc
  • Beats per hour: 18,000
  • Balance Type: Monometallic screw balance
  • Power Reserve: Approx. 41 hours
  • Production Period: 1947+
  • Identification: Marked with Landeron logo and 51 under balance wheel. Listed in the "Official Catalogue of genuine Swiss Watch repair parts" from 1949.
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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