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Brand: | Landeron Swiss Movements | 
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|---|---|---|---|
| Family: |
Unknown
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| Height: | |||
| Jewels: | 25 | ||
| Reserve: | 40 hours | ||
| Frequency: | 28,800 A/h | ||
| Winding: | Automatic, Central Rotor Automatic Winding | ||
| Diameter: | (11.5 ligne) | ||
| Complications: | Date | ||
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Central-Rotor Automatic  Clockwise Balance Cock |
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| Production: – | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. L24 is a compact automatic movement with various options produced by Landeron Swiss Movements. It is designed as a replacement for the ETA 2824-2 and related movements, with a family of options available, including small seconds, power reserve, big date, moon phase, and GMT hand. The similar day/date movement (a replacement for the ETA 2836-2) is called Cal. L36.
Landeron Swiss Movements (which is unrelated to the historic Landeron company) produces the movement, though some have suggested that it is based on the Tianjin TY2100/ST21 Family with enough Swiss investment to qualify as Swiss Made.
Landeron Cal. 24 Family
The following variations of Cal. L24 have been referenced, though it is unclear how many have been produced in volume:
- 25 jewel, central seconds, date at 3:00
- 25 jewel, date at 3:00, small seconds at 6:00
- 27 jewel, central seconds, date at 3:00, power reserve at 6:00
- 27 jewel, central seconds, power reserve at 6:00, big date at 12:00
- 27 jewel, date at 3:00, small seconds at 6:00, moon phase at 12:00
- 26 jewel, central seconds, 24 hour dial, date at 3:00
- 26 jewel, central seconds, GMT hand, date at 3:00 (“L24 GMT”)
- 25 jewel, central seconds, day and date at 3:00 (“L36”)