The ETA 2678 is a compact automatic watch calibre produced by ETA. It was introduced in 1971 and remains in production as of 2019.
Designed for ladies watches and other small applications, the 2678 measures just 7¾ lignes (17.2 mm) in diameter and is 5.35 mm tall. It includes hour, minute, and second hands and both day and date wheels. The slightly thinner ETA 2671 is similar but omits the day wheel.
Mechanical movement with automatic winding, ball-bearing rotor, bi-directional winding, power reserve 38 hours, date with quickset, hacking seconds.
The movement is used for ladies' watches. It extends the ETA 2671 with a weekday display.
- Self-winding movement with bi-directional winding, ball-bearing rotor
- Regulator system ETACHRON
- Flat hairspring, eccentric precision adjustment for the regulator
- Hours, minutes
- Date with quickset date feature
- 7¾ lignes
- Ø 17.2 mm, H 5,35 mm
- 25 jewels
- 28,800 A/h
- Power reserve 38 h
- Since 1971