====== ETA 2770 calibres ======
**Calibre 2770** was one of a family of [[automatic]] movements from [[ETA]] produced from [[1969]] through [[1982]]. In all, over 25 million examples were made.

===== Overview =====
This family of 11.5 [[ligne]] movements included both hand winding and [[automatic]] variants. Nearly every model has a corresponding model with or without automatic winding. Both 21,600 A/h and 28,800 A/h versions were made of many of these movement as well.

All members of the family are 11.5 ligne in diameter (25.6 mm) and have 17, 21, or 25 jewels. 21,600 A/h models have a power reserve of 48 hours, while 28,800 A/h models have 45 hour power reserve. The non-date and date-only movements are 5.2-5.3 mm thick, while the day/date (and some date-only) versions measure 5.9-6.0 mm thick.

===== Variants =====

^Speed (A/h) ^Movement ^Corresponding Hand-winding ^Years Made ^Height ^Notes ^
|21,600 A/h |[[ETA 2770]]\\ [[ETA 2776]] |[[ETA 2750]] |1969-1982 |5.3 mm |
| ::: |[[ETA 2772]] |[[ETA 2752]] |1969-1982 |5.3 mm |Date|
| ::: |[[ETA 2773]] |[[ETA 2753]] |1969-1982 |5.3 mm |Date, [[Triovis regulator]]|
| ::: |[[ETA 2778]] |[[ETA 2758]] |1969-1982 |6.0 mm |Date, day|
| ::: |[[ETA 2779]] |[[ETA 2759]] |1969-1982 |6.0 mm |Date, day, [[Triovis regulator]]|
| ::: |[[ETA 2781]] |[[ETA 2761]] |1969-1982 |5.9 mm |[[Quickset]] date|
| ::: |[[ETA 2782]] |[[ETA 2762]] |1969-1982 |5.3 mm |Quickset date|
| ::: |[[ETA 2783]] |[[ETA 2763]] |1969-1976 |5.2 mm |Quickset date, different stem|
| ::: |[[ETA 2788]] |[[ETA 2768]] |1969-1982 |5.9 mm |Quickset date, day|
| ::: |[[ETA 2789]] |[[ETA 2769]] |1969-1976 |5.9 mm |Quickset date and quickset day|
| ::: |[[ETA 2789-1]] |[[ETA 2769-1]] |1976-1980 |5.9 mm |Quickset date and quickset day with 2 languages|
|28,800 A/h |[[ETA 2771]] |[[ETA 2751]] |1971-1980 |5.2 mm |
| ::: |[[ETA 2774]] |[[ETA 2754]] |1971-1980 |5.3 mm |Date|
| ::: |[[ETA 2780]] |[[ETA 2760]] |1968-1970 |5.9 mm |Date, day|
| ::: |[[ETA 2784]] |[[ETA 2764]] |1971-1978 |5.2 mm |Quickset date|
| ::: |[[ETA 2790]] |None |1970-1976 |5.9 mm |Quickset day and quickset date|
| ::: |[[ETA 2790-1]] |None |1976-1980 |5.9 mm |Quickset day and quickset date with 2 languages|
| ::: |[[ETA 2791]] |None |1970-1976 |5.9 mm |Quickset date|

Note some dates are approximate for the entire family of movements.

===== See Also =====
  * [[ETA 2750 calibres]]


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