Miyota · 83 series
8315
A longer-running alternative to the 8215, retaining a 3 Hz rhythm and date display.
At a glance
- Type
- Automatic mechanical
- Display / complication
- Date
- Architecture
- Central rotor, extended running time
- Timebase
- 21,600 vph / 3 Hz
- Power reserve
- Approx. 60 h
- Movement height
- 5.67 mm
- Jewels
- 21
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.
The extra reserve is the useful distinction: around 60 hours versus approximately 42 for the 8215. Movement height remains 5.67 mm.
For the enthusiast
Miyota lists case-construction compatibility with several 82-series movements. Check dial, hand and stem drawings before planning a swap.