ETA 2681

ETA Cal. 2681 is a compact automatic movement with date.

Cal. 2681 is part of ETA’s regular “Mecaline” line. It was introduced in 1981 and is still produced as of 2019.

Longines uses Cal. 2681 as their Cal. L580.

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*