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Brand: | ETA | 
|
|---|---|---|---|
| Family: | |||
| Height: | 3.50 mm | ||
| Jewels: | 17 | ||
| Reserve: | hours | ||
| Frequency: | 28,800 A/h | ||
| Winding: | Hand winding | ||
| Diameter: | 17.20 mm (7.75 ligne) | ||
| Image from TimeConnection.com | Complications: | ||
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Hand-Winding  Etachron Regulator |
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| Production: 1971 – 2004 | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. 2660 was a compact hand-winding 3-handed movement produced from 1971 through 2004 (or perhaps as late as 2010) by ETA. It was closely related to the automatic ETA 2671 and ETA 2678.
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* |
