“Established 1960 by Seiko in Suwa, Japan, as the high-end manufacture-grade arm of Seiko.”

GRAIL ATLAS · Grand SeikoShare

Image courtesy of Grand Seiko, official press kit

Shiojiri, Japan

Grand SeikoIn-house manufacture

Brand history

Mechanical Grand Seikos are built at the Shinshu Watch Studio in Shiojiri (Nagano); Spring Drive and the high-end mechanical lines are made at the Shizukuishi Watch Studio in Iwate.

Established 1960 by Seiko in Suwa, Japan, as the high-end manufacture-grade arm of Seiko. Spun off as an independent brand in 2017. Grand Seiko has consistently produced some of the most-precise mechanical watches in production (the 9S caliber series) plus the Spring Drive (a quartz-regulated mechanical hybrid). The dial finishing, particularly the natural-landscape-inspired textures (Snowflake, Shunbun, Birch), is widely acknowledged as best-in-class at the price point.

• 
  Snowflake SBGA211 · SBGA211

  luxurymodernGrand Seiko Cal. 9R65: Spring Drive automatic, 19,800bph (glide spring), 72h PR, 30j; tri-synchro regulator, +-1 sec/day accuracy41mm2017–presenteditorial
  Open
• 
  Shunbun SBGA413 · SBGA413

  luxurymodernGrand Seiko Cal. 9R65: Spring Drive automatic, 19,800bph (glide spring), 72h PR, 30j; tri-synchro regulator, +-1 sec/day accuracy41mm2021–presenteditorial
  Open
• Heritage Hand-Wind SBGW291 · SBGW291

  luxurymodernGrand Seiko Cal. 9S64: in-house manual-wind, 28,800bph, 72h PR, 24j; extensively hand-finished with Zaratsu polishing; SBGW series workhorse38mm2020–presenteditorial
  Open
• 
  Sport Spring Drive GMT SBGE285 · SBGE285

  luxurymodernGrand Seiko Cal. 9R66: Spring Drive automatic GMT, 19,800bph (glide spring), 72h PR, 30j; tri-synchro regulator, second time zone; +/-1 sec/day accuracy41mm2020–presenteditorial
  Open
• 
  Elegance Spring Drive Manual SBGY007 · SBGY007

  luxurymodernGrand Seiko Cal. 9R31: Spring Drive manual-wind, 19,800bph (glide spring), 72h PR, 30j; tri-synchro regulator; +/-1 sec/day accuracy38.5mm2020–presenteditorial
  Open
• 
  Heritage Mechanical GMT SBGM221 · SBGM221

  luxurymodernGrand Seiko Cal. 9S66: in-house automatic, 28,800bph, 72h PR, 35j; Swiss lever escapement, extra precision; used in GMT models39.5mm2017–presenteditorial
  Open
• 
  Heritage Hi-Beat "White Birch" SLGH005 · SLGH005

  luxurymodernGrand Seiko Cal. 9SA5: in-house hi-beat automatic, 36,000bph, 80h PR, 47j; dual impulse escapement, free-sprung balance; Grand Seiko flagship caliber40mm2021–presenteditorial
  Open
• 
  Heritage Hand-Wind SBGW231 · SBGW231

  luxurymodernGrand Seiko Cal. 9S64: in-house manual-wind, 28,800bph, 72h PR, 24j; extensively hand-finished with Zaratsu polishing; SBGW series workhorse37.3mm2017–presenteditorial
  Open
• 
  Heritage Hi-Beat 36000 GMT SBGJ201 · SBGJ201

  luxurymodernGrand Seiko Cal. 9S86: in-house hi-beat automatic with GMT, 36,000bph, 55h PR, 37j; conventional Swiss lever escapement, independently adjustable GMT hand; used in SBGJ20139.5mm2014–presenteditorial
  Open
• Heritage Hi-Beat 36000 GMT SBGJ223 · SBGJ223

  luxurymodernGrand Seiko Cal. 9S86: in-house hi-beat automatic with GMT, 36,000bph, 55h PR, 37j; independently adjustable GMT hand; conventional Swiss lever escapement40mm2019–present
  Open
• 
  Heritage Hi-Beat 36000 SBGH267 · SBGH267

  luxurymodernGrand Seiko Cal. 9SA5: in-house hi-beat automatic, 36,000bph, 80h PR, 47j; dual impulse escapement, free-sprung Dual Impulse Escapement; Grand Seiko flagship caliber40mm2023–present
  Open
• 60th Anniversary Hi-Beat SLGH002 · SLGH002

  luxurymodernGrand Seiko Cal. 9SA5: in-house hi-beat automatic, 36,000bph, 80h PR, 47j; dual impulse escapement, free-sprung balance; the first watch to carry the 9SA5 caliber, released ahead of SLGH00540mm2020
  Open
• 
  Taisetsu SBGA415 · SBGA415

  luxurymodernGrand Seiko Cal. 9R65: Spring Drive automatic, 19,800bph (glide spring), 72h PR, 30j; tri-synchro regulator, +-1 sec/day accuracy40mm2019–present
  Open
• 
  Evolution 9 Spring Drive "Lake Suwa" SLGA019 · SLGA019

  luxurymodernGrand Seiko Cal. 9RA2: Spring Drive automatic, 120h PR (5-day), 38j; twin mainspring barrels, tri-synchro regulator; +/-0.5 sec/day (+/-10 sec/month) accuracy40mm2023–present
  Open
• 
  Evolution 9 Hand-Wound Hi-Beat SLGW003 · SLGW003

  luxurymodernGrand Seiko Cal. 9SA4: in-house manual-wind hi-beat, 36,000bph, 80h PR; +5/-3 sec/day accuracy38.6mm2023–present
  Open
• 
  Masterpiece Spring Drive 8 Days SBGD201 · SBGD201

  luxurymodernGrand Seiko Cal. 9R01: Spring Drive manual-wind, three barrels, 192h (8-day) PR; +/-10 sec/month accuracy, 56j43mm2022–present
  Open
• 
  Evolution 9 Collection Tentagraph · SLGC001

  luxurymodernGrand Seiko Cal. 9SC5: self-winding with manual winding, 36,000 bph, ~72h PR, 60j43.2mm2023–present
  Open
• 
  Evolution 9 Spring Drive 5 Days "Lake Suwa" SLGA021 · SLGA021

  luxurymodernGrand Seiko Cal. 9RA2: Spring Drive, 120h (5-day) PR, 38j, 34mm x 5mm; measures its own temperature 540 times an hour to compensate the oscillator, rated to +/-0.5 sec a day and +/-10 sec a month; power reserve moved to the movement side to slim the case40mm2022–present
  Open

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