Seiko · 4R series
4R35
Seiko’s three-hand date automatic: a useful starting point for reading the specifications of modern mechanical Seikos.
At a glance
- Type
- Automatic mechanical
- Display / complication
- Date
- Architecture
- Automatic winding with crown hand winding
- Timebase
- 21,600 vph / 3 Hz
- Power reserve
- Approx. 41 h
- Jewels
- 23
Reference sources reviewed 7 November 2026. Published specifications, not independent measurements. Versions and complete-watch specifications can differ; fields without a verified figure are omitted or identified.
What distinguishes it
Look beyond the reference.
A 3 Hz balance, conventional date and roughly 41-hour reserve make its priorities easy to understand. The current Seiko manual lists 23 jewels.
For the enthusiast
Keep the Seiko 4R35 reference separate from TMI’s NH35 supplier reference. Compare their documented specifications and the exact watch generation rather than assuming the names or parts are interchangeable.