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Brand: | Grand Seiko, Seiko, Shizukuishi Watch Studio | 
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| Family: |
Unknown
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| Height: | 4.49 mm | ||
| Jewels: | 33 | ||
| Reserve: | 50 hours | ||
| Frequency: | 28,800 A/h | ||
| Winding: | Automatic, Bi-Directional Automatic Winding | ||
| Diameter: | 19.40 mm | ||
| © Seiko Grand Seiko Cal. 9S25A | Complications: | Date, Hand Winding, Quick Date Correction | |
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
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 Balance Bridge  Screw Regulator |
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| Production: 2018 – Current | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. 9S25 is the first in a series of luxury automatic movements for women. Introduced by Seiko in 2018, Cal. 9S25 incorporates many of the advances found in the Cal. 9S6x family of movements, including MEMS engineering on the pallet fork and the new Spron 610 balance spring alloy.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.