Calibre record · Automatic
Seiko calibre 7S26
Documented
The reliable, inexpensive automatic of Seiko 5 and SKX diver's watches; succeeded by the 4R36, which adds hand-winding and hacking.
- Manufacturer
- Seiko
- Type
- Automatic
- Winding
- Automatic (Magic Lever); no hand-winding or hacking
- Production
- 1996–2010s
- Country
- Japan
- Diameter
- 27.4 mm
- Height
- 5.32 mm
- Jewels
- 21
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- c. 41 h
- Oscillator / escapement
- Detached lever escapement
- Complications
- Day-date
Figures are those commonly published for the standard version; individual versions and grades differ. “Undocumented here” means the value has not yet been confirmed for this record.
