Seiko 6R15
Quick answer
What is the Seiko 6R15?
Seiko 6R15 automatic calibre with 23 jewels, 21,600 vph frequency and approximately 50 hours of power reserve according to WatchBase.
- Jewels
- 23
- Power reserve
- 50h
- Linked watches
- 1
Why this movement matters
Power reserve
50 hours means you can take the watch off over a weekend and it will usually still be running Monday morning.
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.
Serviceability
Known Seiko 6R15 service paths through Seiko service centres and qualified independents. Avoid fixed service-cost or interval claims without a direct source.
Movement honesty
Movement honesty classification pending editorial review.
Technical specifications
Serviceability
Known Seiko 6R15 service paths through Seiko service centres and qualified independents. Avoid fixed service-cost or interval claims 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 6R15?+
Seiko 6R15 is a Seiko caliber (6R15). Seiko 6R15 automatic calibre with 23 jewels, 21,600 vph frequency and approximately 50 hours of power reserve according to WatchBase. Adds hand-winding and hacking seconds above entry 7S/4R tiers. It is not the newer 6R35 used in modern Prospex Alpinist references.
What is the Seiko 6R15 based on?+
The architecture traces to 7S platform derivative with Spron mainspring upgrade. WatchIntel classifies lineage separately from marketing "in-house" claims.
What are the key specs of the Seiko 6R15?+
Core specs: 23 jewels, 50-hour power reserve, automatic. See the technical specifications table for escapement, certification, and functions.
How easy is it to service the Seiko 6R15?+
Known Seiko 6R15 service paths through Seiko service centres and qualified independents. Avoid fixed service-cost or interval claims without a direct source.
Which watches use the Seiko 6R15?+
WatchIntel links 1 published watch to this caliber in our database. Our database is not complete.
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