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You are here: Home / Families / Seiko 9S6x Family

Seiko 9S6x Family

Last Update: February 1, 2020

BRANDS: Grand Seiko, Seiko, Shizukuishi Watch Studio

Production: 2006 – Current
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
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Seiko 9S6x Family Overview

9S is the family of high-end mechanical watch movements used in the Grand Seiko and Credor watch lines. The current “3 days” 9S6x family debuted in 2006 with Cal. 9S67, and has replaced the Seiko 9S5x series over the following decade. The movement boasts 72 hours of power reserve thanks to a stronger Spron 510 or 610 mainspring and escape wheel and pallet form finished with MEMS technology.

Seiko boasts that these movements can deliver -3/+5 seconds per day accuracy in controlled static tests. On the wrist, the company claims -1/+10 second accuracy per day, and Seiko adjusts them in 6 positions. Adjustment is performed using a screw with index moving a mobile regulator for the flat hairspring.

The 9S family movements are constructed by hand at Seiko’s Shizukuishi Watch Studio in Morioka, Iwate Prefecture, Japan.

All watches in the 9S6x series feature hand winding, hacking seconds, and operation at 28,800 A/h. Most feature automatic winding with a central rotor mounted on five ball bearings. These use a conventional reverser wheel rather than the Seiko Magic Lever system found on the previous Cal. 9S5x series.

Seiko 9S6x Family

ProductionModelsWindingJewelsDateNotes
Cal. 9S612015-presentSBGRAutomatic33No
Cal. 9S632019-presentSBGKManual33NoPower reserve at 3:00
Small seconds at 9:00
Cal. 9S642011-presentSBGWManual24No
Cal. 9S652010-presentSBGRAutomatic35Yes
Cal. 9S662010-presentSBGMAutomatic35YesCentral GMT hand
Cal. 9S672006-2010SBGLAutomatic41YesPower reserve at 3:00
Cal. 9S682017-presentSBGRAutomatic35YesLarger size

See Also: Seiko 9S6x Family

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Calibre Start Year End Year Jewels Diameter (mm) Height (mm) Complications
Seiko 9S61 2015 Current 33 28.40 Hacking Seconds, Hand Winding
Seiko 9S63 2019 Current 33 28.40 Hacking Seconds, Power Reserve Indicator
Seiko 9S64 2011 Current 24 Hacking Seconds
Seiko 9S65 2010 Current 35 Date, Hacking Seconds, Hand Winding, Quick Date Correction
Seiko 9S66 2010 Current 35 24 Hour Hand, Date, GMT Hand, Hacking Seconds, Hand Winding, Independently-Adjustable 24 Hour Hand, Quick Date Correction
Seiko 9S67 2006 2010 41 28.40 Date, Hacking Seconds, Hand Winding, Power Reserve Indicator, Quick Date Correction
Seiko 9S68 2017 Current 35 Date, Hacking Seconds, Hand Winding, Quick Date Correction

Seiko 9S61

Seiko 9S63

Seiko 9S64

Seiko 9S65

Seiko 9S66

Seiko 9S67

Seiko 9S68

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