Editing ETA SA (section)

=== ETA 2824-2 ===
[[File:HamiltonKhakiFieldOfficer-009.jpg|thumb|right|[[Hamilton Watch Company|Hamilton]] Khaki Field Officer H70615133 with Swiss ETA 2824-2 movement]]
One workhorse of the ETA mechanical line is the ETA 2824–2, The 2824 is an automatic winding, twenty-five jewel movement, available in four executions or grades: Standard, Elaborated (improved), Top and [[COSC|Chronometer]].<ref>{{Citation | contribution-url = http://www.eta.ch/d/produkte/Mecaline/pdf/ETA_2824_2.pdf | contribution = Levels of component quality | title = 2824 | publisher = ETA | place = [[Switzerland|CH]] | access-date = 2007-06-05 | archive-date = 2007-07-10 | archive-url = https://web.archive.org/web/20070710041751/http://www.eta.ch/d/Produkte/mecaline/pdf/ETA_2824_2.pdf | url-status = dead }}.</ref> The key components which differ at the line of demarcation between Elaborated and Top are the shock protection system (Elaborate=Etachoc/Top=Incabloc), balance wheel (Elaborate=Brass/Top=Glucydur) and the hairspring (Elaborate=Nivarox 2/Top=Anachron). In contrast, since the addition of the "-2" at the end of the movement number, there has been no difference between the standard and the chronometer grades in terms of the regulator mechanism, both being Etachron. To illustrate the differences in accuracy garnered by the successive grades, consider the following specifications:
* the Standard grade is adjusted in two positions with an average rate of ±12 seconds/day, with a maximum daily variation of ±30 seconds;
* the Elaborated grade is adjusted in three positions with an average rate of ±7 seconds/day, with a maximum daily variation of ±20 seconds;
* the Top grade is adjusted in five positions with an average rate of ±4 seconds/day, with a maximum daily variation of ±15 seconds.

The Chronometer grade must meet strict standards prescribed by the [[COSC]]. Chronometer grade movements are serial numbered, as that is a requirement of the certification authority. Moreover, the degree of decoration on the movement's parts, generally only an aesthetic improvement, increases as well with the grade.<ref>{{Citation | type = Manufacturing Information | title = 2801-2 through 2836-2 | publisher = ETA | place = Grenchen | date = May 2006}}.</ref>