BRANDS: Blancpain, Frédéric Piguet
| Production: – Current | |||||||||||
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| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
The Cal. 1240 family of movements by Frédéric Piguet (later Manufacture Blancpain) are a series of alarm calibres. Measuring 31.70 mm (12 ligne) in diameter, they feature a single power barrel and have been updated with a silicon balance spring.
| Name | Diam. | Height | Power Reserve (Hours) | Jewels | Parts | Speed Hz. | Silicon Balance Spring | Features |
|---|---|---|---|---|---|---|---|---|
| 1240H | 31.70 | 6.20 | 45 | 36 | 392 | 4 | Yes | Alarm, Double Timezone, Alarm Power Reserve, Date |
| 1241H | 31.70 | 6.20 | 45 | 38 | 407 | 4 | Alarm, Double Timezone, Alarm Power Reserve, Date, Small Seconds | |
| 1241G | 31.70 | 6.20 | 45 | 38 | 405 | 4 | Alarm, Double Timezone, Alarm Power Reserve, Date, Small Seconds | |
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