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You are here: Home / Movements / Seiko 9S86

Seiko 9S86

Last Update: February 1, 2020

Brand:Grand Seiko, Seiko, Shizukuishi Watch Studio
Family:
Seiko 9S8x Hi-Beat Family
Height:
Jewels:37
Reserve:55 hours
Frequency:36,000 A/h
Winding:Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding
Diameter:28.40 mm
© Grand Seiko  Complications:24 Hour Hand, Date, GMT Hand, Hacking Seconds, Hand Winding, Independently-Adjustable 24 Hour Hand, Quick Date Correction
Hands:Central 24 Hour Hand, Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00
Distinguishing Technical Characteristics
Central-Rotor Automatic
Clockwise Balance Cock
Screw Regulator
Balance, Balance at 2:00
Production: 2014 – Current
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

Grand Seiko Cal. 9S86 is a high-beat automatic movement with date and independently-adjustable central GMT hand. It is closely related to Cal. 9S85, which lacks the GMT hand. It was introduced in 2014 at Baselworld and remains in production as of 2020.

Seiko 9S86

Cal. 9S86 features a proprietary Spron 610 alloy for the mainspring, with improved impact and magnetic resistance. The escapement is created using MEMS technology for precision. The mainspring is constructed of the Spron 530 alloy for higher torque and increased power reserve.

Cal. 9S86 is used in the Grand Seiko SBGJ series of watches.

A “Special” tune of the 9S86 was used in a few models, notably the 2018 SBGJ229. This achieves accuracy of -2/+4 seconds.

Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.
Manufacturer Link

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