The 9R family of Spring Drive are Seiko's most accurate mechanical calibres.

All Seiko 9R movements are rated to be accurate to within ±1 second per day, with the 9R15 listed at ±0.5 second per day.

• 9R15 - 30 jewels, accuracy of ±0.5 second per day
• 9R65 - 30 jewels
• 9R66 - 30 jewels GMT
• 9R86 - 50 jewels chronograph

• 9R01
  • Grand Seiko SBGD Spring Drive (2016-present)
• 9R02
  • Grand Seiko SBGZ Spring Drive (2019-present)
• 9R15
  • Grand Seiko SBGA Spring Drive (2014-present)
• 9R16
  • Grand Seiko SBGE Spring Drive (2016-present)
• 9R31
  • Grand Seiko SBGY Spring Drive (2019-present)
• 9R65
  • Grand Seiko SBGA Spring Drive (2004-present)
• 9R66
  • Grand Seiko SBGE Spring Drive (2008-present)
• 9R84
  • Grand Seiko SBGB Spring Drive (2016?-present)
• 9R86
  • Grand Seiko SBGC Spring Drive (2008?-present)
• 9R96
  • Grand Seiko SBGC Spring Drive (2016-present)