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You are here: Home / Movements / Seiko 4S35

Seiko 4S35

Last Update: February 5, 2020

Brand:Seiko
Family:
Seiko 4S Family
Height:4.00 mm
Jewels:25
Reserve:40 hours
Frequency:28,800 A/h
Winding:Automatic, Bi-Directional Automatic Winding
Diameter:25.60 mm (11.5 ligne)
© Seiko  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: 1992 – 2000
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
Cal. 4S35 in the first modern Seiko Automatic model from 1992

Cal. 4S35 is an automatic movement with date produced for high-end Seiko Automatic watches from 1992 through 1998. It was critical to the development of the modern Grand Seiko mechanical watch series and laid the foundation for the Grand Seiko 9S movement series.

Cal. 4S35 is identical in design to Cal. 4S15 and Cal. 4S25. The only differences are in finishing and regulation, with Cal. 4S35 delivering -10/+15 seconds per day compared to -15/+25 seconds for Cal. 4S15 and 4S25. The early 1993 Seiko catalog lists Cal. 4S35 as being 4.00 mm thick, 0.17 mm thinner than the similar Cal. 4S15. This marks the first appearance of the 4S series in a seiko catalog, though official company sources place the introduction of this movement as 1992.

Cal. 4S35 was used in the Seiko Automatic SCVK series from 1992 through 1998.

This page from the 1993 Seiko catalog shows Cal. 4S35 along with the SCVK001 and SCVK002 watches that used it. Note that these are simply called “Seiko Automatic.”
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.
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