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You are here: Home / Movements / Landeron 51

Landeron 51

Last Update: April 11, 2022

Brand:Landeron
Family:
Landeron 48 Family
Height:6.22 mm
Jewels:17
Reserve: hours
Frequency:18,000 A/h
Winding:Hand winding
Diameter:31 mm (13.75 ligne)
 Modified Hammer Complications:2-Button, Cam Switching Chronograph, Chronograph, Horizontal Clutch Chronograph
Hands:30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Small Seconds Hand at 9:00
Distinguishing Technical Characteristics
Hand-Winding
Clockwise Balance Cock
Screwed Balance
Indexed Regulator
Balance
Balance at 12:00
Production: 1947 – 
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

Cal. 51 is a simple cam-switching chronograph movement produced by Landeron in the 1950s. It was part of a larger family of movements based on Cal. 48 and is closely related to calibers 55 and 151, 159 (with date pointer), 57, 59, 80, and 180 (with full calendar), and 81 and 181 (with full calendar and moon phase indicator).

Production is said to have begun in 1947, and the movement was updated around 1950 with a new hammer and cam mechanism. Unlike many movements in the family it uses a traditional horizontal clutch to activate the chronograph function.

Original Hammer
New Hammer

Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.

Ranfft Pink Pages
External Link
External Link
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