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You are here: Home / Movements / Seiko 9SA5

Seiko 9SA5

Last Update: March 5, 2020

Brand:Grand Seiko, Seiko, Shizukuishi Watch Studio
Family:
Seiko 9SA Family
Height:5.18 mm
Jewels:47
Reserve:80 hours
Frequency:36,000 A/h
Winding:Automatic, Central Rotor Automatic Winding
Diameter:31.86 mm (14 ligne)
© Grand 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
Central-Rotor Automatic
Balance Bridge
Balance at 12:00
Central Rotor
Production: 2020 – Current
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

Cal. 9SA5 is the first movement in the new Hi-Beat 80 Hours 9SA series from Grand Seiko. It is a slim but oversized automatic movement with date. Cal. 9SA5 was introduced in 2020 in the Grand Seiko 60th Anniversary, Ref. SLGH002.

Seiko 9SA Family

The 9SA family movements operate at 36,000 A/h (10 Hz) yet achieve 80 hours power reserve thanks to precision materials and a novel double-impulse escapement. This escapement, similar to George Daniels famed Coaxial design, is paired with a free-sprung balance, a first for Grand Seiko. The movement wheel train is entirely new as well, designed so all of the gears sit are in a single plane, reducing movement thickness. This is possible thanks to a larger 31.86 mm diameter, up from 28.40 mm in previous Grand Seiko movements.

CalibreJewelsFunctionsModels
Cal. 9SA547DateSLGH
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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