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+
- Country: Switzerland
- Identification: Marked with Landeron logo and 51 under balance wheel. Listed in the "Official Catalogue of genuine Swiss Watch repair parts" from 1949.
- Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
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