AutomaticManufacture
7S26
Durable entry-level automatic calibre without hacking or hand winding.
- Reserve
- 41 h
- Frequency
- 21,600 vph
- Jewels
- 21
Japan · Movement Manufacturer
Seiko
Seiko develops movements across nearly every price and technology category, from accessible automatics to high-beat and Spring Drive systems.
8 calibres1881 foundedMechanical, quartz and hybrid innovation
Selected Milestones
1956 — Marvel movement
1969 — Automatic chronograph and Quartz Astron
1999 — Spring Drive commercialisation
2020 — Calibre 9SA5
Calibre Library
Seiko movements
AutomaticManufacture
4R35
Accessible automatic movement with hacking and hand winding.
- Reserve
- 41 h
- Frequency
- 21,600 vph
- Jewels
- 23
AutomaticManufacture
4R36
Day-date sibling of the 4R35.
- Reserve
- 41 h
- Frequency
- 21,600 vph
- Jewels
- 24
AutomaticManufacture
6R15
Mid-tier automatic calibre used in earlier Prospex and Presage models.
- Reserve
- 50 h
- Frequency
- 21,600 vph
- Jewels
- 23
AutomaticManufacture
6R35
Extended-reserve evolution of Seiko’s 6R family.
- Reserve
- 70 h
- Frequency
- 21,600 vph
- Jewels
- 24
AutomaticManufacture
8L35
Premium diver movement assembled for higher-end Prospex watches.
- Reserve
- 50 h
- Frequency
- 28,800 vph
- Jewels
- 26
Automatic chronographManufacture
6139
Historic integrated automatic chronograph introduced in 1969.
- Reserve
- 45 h
- Frequency
- 21,600 vph
- Jewels
- 17
Spring DriveManufacture
9R65
Core Grand Seiko Spring Drive calibre.
- Reserve
- 72 h
- Frequency
- Glide motion
- Jewels
- 30