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You are here: Home / Movements / Seiko 4S25

Seiko 4S25

Last Update: February 5, 2020

Brand:Seiko
Family:
Seiko 4S 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
Balance
Balance at 4:30
Barrel at 12:00
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


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