| Brand: | Seiko | 
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|---|---|---|---|
| Family: | |||
| Height: | 4.17 mm | ||
| Jewels: | 25 | ||
| Reserve: | 40 hours | ||
| Frequency: | 28,800 A/h | ||
| Winding: | Automatic, Bi-Directional Automatic Winding | ||
| Diameter: | 25.60 mm (11.5 ligne) | ||
| Complications: | Date, Hacking Seconds, Hand Winding, Quick Date Correction | ||
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Clockwise Balance Cock  Screw Regulator |
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| Production: 1993 – 1998 | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. 4S25 is an automatic movement with date developed by Seiko in the early 1990s. It was based on the Seiko 52 stream of movements, which had been retired in 1976, and was responsible for Seiko’s resurgence as a maker of high-end watches. Cal. 4S25 was rarely used compared to Cal. 4S15.
Cal. 4S25 is identical in design to Cal. 4S15 and the high-spec Cal. 4S35. The only differences are in finishing and regulation, with Cal. 4S15 and 4S25 delivering -15/+25 seconds per day compared to -10/+15 seconds for Cal. 4S35.
- 1993-1995 Seiko Automatic SCVJ001
- 1993-1998 Seiko Automatic SCVJ003
- 1993-1995 Seiko Automatic SCVH001
- 1993-1995 Seiko Automatic SCVH002