Manufacturer | ETA |
Caliber Number | 2840 |
Movement Type | Automatic, self-winding mechanical |
Lignes | 11.5”’ |
Diameter | 26mm |
Casing Diameter | 25.6mm |
Height | 4.7mm |
Jewel Count | 23 |
Beat Rate / Frequency | 21,600 bph / 3 Hz |
Lift Angle | 50 degrees (unconfirmed) |
Power Reserve | ~38 hours |
Rotor Style | Ball-bearing |
Rotor Winding Direction | Bi-directional (reversers) |
Hand-Windable? | Yes |
Anti-Shock Device | Novodiac |
Regulator? | None |
Hand Count | 3 |
Functions | Central hours; central minutes; central sweeping seconds |
Hacking Seconds? | No |
Country of Manufacture | Switzerland, Swiss made (V8) |
Known Models | (Add your watch to the comments below…) |
The ETA caliber 2840 is a a vintage automatic watch movement that was meant to be an economy version of the 2800 family of movements, with some similarities to the framework of the famous 2824-2.
This caliber is found exclusively in Swatch watches from the 1990s (since circa 1991), which is why official technical documentation appears to be non-existent.
You may see this calibre described as being the no-date version of the 2842, however, there are 2842 movements without a date as well.
Additional Resources:
Recent Comments
This is the movement in my 1975 Zodiac sea wolf.
Mine has been sitting synchronized with and next to my daily Bulova precisionist for months.…
This movement is also used in the Bell & Ross BR05 GMT
Yep - and even Worse in my opinion: the date does not change in one…
A watch is more, than a sum of its parts. This movement is reliable, precise…
I figured that the best way to experience and evaluate the movement would be to…
Isn't this to make things more obvious ? The casing is made by Bulova China…