Seiko 4R36
Quick answer
What is the Seiko 4R36?
Seiko 4R36 automatic calibre with manual winding, stop-seconds, day/date display, 24 jewels and approximately 41 hours of power reserve.
- Jewels
- 24
- Power reserve
- 41h
- Linked watches
- 1
Why this movement matters
Power reserve
41 hours means you can take the watch off over a weekend and it will usually still be running Monday morning. That is a shorter reserve by modern standards, so regular wearing or a winder helps.
Frequency
21,600 beats/hour / 3 Hz is a common modern automatic rate. Higher frequency can improve stability in some conditions, but service access and long-term ownership matter more than Hz alone.
Certification
Seiko in-house accuracy standard (not COSC) means the movement passed an independent timing standard before leaving the factory. That is useful, but it does not replace long-term ownership feedback or service network access.
Serviceability
Good in principle through Seiko service channels. Do not publish fixed service costs or intervals without a direct source.
Finishing
Practical industrial finish appropriate to price tier Finishing on tool-watch calibres is often practical rather than exhibition-grade. That is not automatically a flaw if the movement is robust and well regulated.
Movement honesty
Movement honesty classification pending editorial review.
Technical specifications
About this movement
Seiko Calibre 4R36 is an in-house automatic day-date movement used across 5 Sports, Presage entry models, and other mid-tier Seiko lines. It adds hacking seconds and hand-winding to the 4R family, making it one of the most feature-dense movements at its price point.
Serviceability
Good in principle through Seiko service channels. Do not publish fixed service costs or intervals without a direct source.
Best watches using this movement
WatchIntel linked watches
Published references in our database. This list is not complete.
Compared with similar movements
Similar movement comparisons pending editorial review.
Frequently asked questions
What is the Seiko 4R36?+
Seiko 4R36 is a Seiko caliber (4R36). Seiko 4R36 automatic calibre with manual winding, stop-seconds, day/date display, 24 jewels and approximately 41 hours of power reserve. Seiko official instruction data gives a broad factory accuracy range of +45 / -35 seconds per day under normal temperature conditions. Do not claim +/- 15 seconds per day.
What are the key specs of the Seiko 4R36?+
Core specs: 24 jewels, 41-hour power reserve, automatic. See the technical specifications table for escapement, certification, and functions.
How easy is it to service the Seiko 4R36?+
Good in principle through Seiko service channels. Do not publish fixed service costs or intervals without a direct source.
Which watches use the Seiko 4R36?+
WatchIntel links 1 published watch to this caliber in our database. Our database is not complete.
WatchIntel is independent. Not affiliated with Seiko, Rolex, Omega, TAG Heuer, Tudor, Hublot or any other watch brand.