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Brand: | Landeron | 
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|---|---|---|---|
| Family: | |||
| Height: | 6.2 mm | ||
| Jewels: | 17 | ||
| Reserve: | hours | ||
| Frequency: | 18,000 A/h | ||
| Winding: | Hand winding | ||
| Diameter: | 31.00 mm (13.75 ligne) | ||
| Complications: | 3-Button Chronograph, Cam Switching Chronograph, Chronograph, Horizontal Clutch Chronograph, Oscillating Pinion 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  Indexed Regulator |
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| Production: – | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. 50 was an early three-button cam-switching chronograph movement produced by Landeron (Charles Hahn & Cie.) It is closely related to the three-button Cal. 47 and unusual column wheel Cal. 49.
Nicolet used Cal. 50.
Like all movements in the family it uses Heuer-style oscillating pinion rather than a traditional horizontal clutch to activate the chronograph function.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.