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Brand: | ETA | 
|
|---|---|---|---|
| Family: | |||
| Height: | 5.35 mm | ||
| Jewels: | 25 | ||
| Reserve: | 44 hours | ||
| Frequency: | 28,800 A/h | ||
| Winding: | Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding | ||
| Diameter: | 17.20 mm (7.75 ligne) | ||
| © ETA ETA 2678 | Complications: | Date, Day, Hacking Seconds, Quick Date Correction, Semi-Instantaneous Date Change | |
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Central-Rotor Automatic  Counter-Clockwise Balance Cock  Etachron Regulator |
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| Production: 1971 – Current | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
ETA Cal. 2678 is a compact automatic movement with day and date primarily used in ladies watches. It is closely related to Cal. 2671.
Cal. 2678 is part of ETA’s regular “Mecaline” line. It was introduced in 1971 and is still produced as of 2019.
ETA produced a variety of movements in the 2600 family since the 1970s. This includes both automatic and hand-winding variants, 7.75 and 8.75 ligne sizes, and 21,600 A/h and 28,800 A/h versions. In the table below, 8.75 ligne movements are denoted with an asterisk and currently-produced movements in bold.
| Calibre | Manual 21,600 A/h | Manual 28,800 A/h | Automatic 21,600 A/h | Automatic 28,800 A/h |
|---|---|---|---|---|
| Base | 2640 | 2660 | 2650 | 2670 |
| Date | 2641 2691* | 2661 | 2651 | 2671 2681* |
| Day/Date | 2648 | 2668 | 2658 2688* | 2678 |
| Date Moon Phase | 2675 2685* |
