| Brand: | Frédéric Piguet | 
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| Family: |
Unknown
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| Height: | 3.70 mm | ||
| Jewels: | 28 | ||
| Reserve: | 40 hours | ||
| Frequency: | 21,600 A/h | ||
| Winding: | Automatic, Central Rotor Automatic Winding | ||
| Diameter: | 18.40 mm (8.25 ligne) | ||
| Complications: | |||
| Hands: | Central Hour Hand, Central Minute Hand | ||
| Distinguishing Technical Characteristics | |||||||||||
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 Central-Rotor Automatic  Clockwise Balance Cock |
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| Production: – | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. FP 815 (also known as Cal. FP 8.15) is an ultra-thin automatic movement from Frédéric Piguet. As an ultra-thin movement it uses a flat hairspring.
It is closely related to the hand-winding Cal. FP 810 and Cal. FP 816, which adds small seconds.