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Brand: | Landeron | 
|
|---|---|---|---|
| Family: | |||
| Height: | 7.42 mm | ||
| Jewels: | 17 | ||
| Reserve: | hours | ||
| Frequency: | 18,000 A/h | ||
| Winding: | Hand winding | ||
| Diameter: | 31.80 mm (14 ligne) | ||
| Complications: | 2-Button, Cam Switching Chronograph, Chronograph, Date, Date by Pointer, Day, Horizontal Clutch Chronograph, Month | ||
| Hands: | 30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Date Pointer at 6:00, Day Window at 11:30, Month Window at 12:30, Small Seconds Hand at 9:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Hand-Winding  Clockwise Balance Cock  Screwed Balance  Indexed Regulator |
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| Production: – | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. 57 is a cam-switching chronograph movement produced by Hahn & Cie. of Landeron in the 1950s. It was based on Cal. 51 as part of the large Cal. 48 family, and features a full calendar like the similar Cal. 59 but is slightly larger at 14 ligne.
Adjustment of the calendar is handled by pushers in the case:
- 1:30 – Month
- 4:30 – Date
- 10:30 – Day
