Sellita · SW300 family
SW300-1
A slim Swiss automatic whose 3.60 mm height gives watch designers more room to work with.
At a glance
- Type
- Automatic mechanical
- Display / complication
- Date
- Architecture
- Central rotor, quickset date, stop seconds
- Timebase
- 28,800 vph / 4 Hz
- Power reserve
- 50 h minimum / 56 h typical
- Movement height
- 3.60 mm
- Jewels
- 25
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.
Compared with the SW200-1, it reduces movement height by one millimetre while retaining a 4 Hz balance. That is a useful construction difference, although the finished watch can still be thick.
For the enthusiast
Figures follow Sellita technical revision 08. Earlier SW300-1 watches may have shorter reserves; the current document does not upgrade an older movement. Date and no-date executions exist, so check the complete reference and the watchmaker’s specification.