Editing ETA SA (section)

==Products==

=== 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>

=== ETA 2892 ===
The ETA 2892.A2<ref>{{cite web |url= http://www.horlogerie-suisse.com/Complications/2892/2892-A2.html |title= 2892 |work= Complications |publisher= Horlogerie Suisse |url-status= dead |archive-url= https://web.archive.org/web/20070305075713/http://www.horlogerie-suisse.com/Complications/2892/2892-A2.html |archive-date= 2007-03-05 }}</ref> is a newer design dating to the 1970s and fitted with top quality components.

An automatic winding, 21-jewel movement, the 2892 is available in three executions or grades: ''Elaborated'', ''Top'' and ''Chronometer''. The key components which differ at the line of demarcation between Elaborated and Top are the 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. The degree of decoration on the movement's parts also increases with the grade.<ref>{{Citation | type = Manufacturing Information | title = 2892A2 | publisher = ETA | place = Grenchen | date = June 2006}}.</ref> To illustrate the differences in accuracy garnered by the successive grades, consider the following specifications:
* ''Elaborated'' grade is adjusted in four positions with an average rate of ±5 seconds/day, with a maximum daily variation of ±20 seconds;
* ''Top'' grade is adjusted in five positions with an average rate of ±4 seconds/day, with a maximum daily variation of ±15 seconds.
* ''Chronometer'' an average rate of −4/+6 with a maximum daily variation of ±5 seconds - standards prescribed by the [[COSC]]. The wider range for the chronometer grade is designed to take into account the differences in a watch's rate between static positions, as when the tests are performed, and the dynamic positions as when a watch is actually worn.  Chronometer grade movements are serial numbered.

The ETA 2892.A2 is usually found in the more expensive and prestigious watches and brands, and owing to its relatively slim height of 3.60&nbsp;mm, the 2892.A2 is a favorite of watch brands that market complicated movements such as [[Breitling SA|Breitling]] with its trademark [[chronograph]] (stop watches).  The 2892 is also used in certain [[International Watch Company]] watches, including newer Ingenieur models introduced in 2013.<ref>{{cite web|url= http://www.hodinkee.com/blog/introducing-the-iwc-ingenieur-automatic-40mm |title=A Look at The New IWC Ingenieur Automatic: 40 mm and Anti-Magnetic, This Is The Purist's Ingy (Live Pics, Pricing)|work=Hodinkee}}</ref>

=== The Omega coaxial based upon an ETA movement ===
Omega's Seamaster line of watches (including the Seamaster Professional 300) previously used an embellished version of the ETA 2892.A2 known as the Omega 1120.  Later versions of the Seamaster used a proprietary [[coaxial escapement]] invented by [[George Daniels (watchmaker)|George Daniels]], an English horologist, and exclusively marketed by [[Omega SA|Omega]], a sister company of ETA. The movement with the coaxial [[escapement]] is known as the Omega 2500 series and is derived from the ETA 2892.  Later versions of the Seamaster "Planet Ocean" migrated from the Omega 2500 to a different coaxial escapement known as the Omega 8500 series with extremely high magnetic resistance.  Current Seamaster Professional 300 models continue to use the Omega 2500 "D" series movements..

=== Valjoux 7750 ===
[[Image:Valjoux7750.JPG|thumb|ETA/Valjoux 7750 automatic movement]]
The  [[Valjoux]] 7750<ref>{{cite web |url= http://www.horlogerie-suisse.com/Complications/7750/7750.html |title= 7750 |work= Complications |publisher= Horlogerie Suisse |url-status= dead |archive-url= https://web.archive.org/web/20070926224817/http://www.horlogerie-suisse.com/Complications/7750/7750.html |archive-date= 2007-09-26 }}</ref> aka ETA 7750 an extremely popular movement used in the majority of mechanical [[chronograph]] watches on the market in 2004.<ref>{{cite web | last = Braun | first = Peter |author2=Andreas Mook  | url = http://home.xnet.com/~cmaddox/valjoux_7750_engine.html | title = The Valjoux 7750 Engine | date = 2004-09-11}}</ref>

The Valjoux 7750 uses a three-plane cam system, the coulisse-lever escapement, rather than the traditional chronograph mechanism, the column wheel. It is constructed of a mainplate, calendar plate, and chronograph top plate. Levers push a cam back and forth, driving the stopwatch mechanism of the Valjoux 7750. In the 1980s, many companies began using the Valjoux 7750 because it was easier to mass-produce and distribute in high-volume. The system and movement were developed by Edmond Capt in 1970, as a fully integrated self-winding mechanism with quick-set day/date based on the Valjoux 7733.<ref>{{Citation | first = John B II | last = Holbrook | title = InSync Magazine | date = December 2006}}.</ref><ref>[http://wornandwound.com/2016/01/26/chronography-5-the-valjoux-7750/ "CHRONOGRAPHY 5: THE VALJOUX 7750"],  MARK MCARTHUR CHRISTIE, wornandwound.com</ref>

The movement is an automatic winding, 25-jewel movement that can be fitted with a variety of features including the triple date (day, date, month and moon phase) or a variety of two and three register models with totalizers or counters for minutes, seconds and hours.  It is available in three executions or grades: Elaborated, Top and Chronometer. The key components which differ at the line of demarcation between Elaborated and Top are the pallet stones, balance wheel & hairspring and the regulator mechanism. To illustrate the differences in accuracy garnered by the successive grades, consider the following specifications:

* ''Elaborated'' grade is adjusted in three positions with an average rate of ±5 seconds/day with a maximum daily variation of ±15 seconds;
* ''Top'' grade is adjusted in five positions with an average rate of ±4 seconds/day with a maximum daily variation of ±15 seconds.
* ''Chronometer'' grade must meet strict standards prescribed by the [[COSC]]: an average rate of −4/+6 with a maximum daily variation of ±5 seconds.<ref>{{Citation | type = Manufacturing Information | title = 7750 through 7760 | publisher = ETA | place = Grenchen | date = September 2006}}.</ref>
<big>'''Powermatic 80 movements'''</big>

The Powermatic 80 is a movement designed and produced by ETA SA. The movements feature is to have 80 hours of power reserve, hence the name. This technology of movement was first announced at Baselworld in 2012.<ref>{{Cite web |date=2019-03-08 |title=Tissot Caliber Powermatic 80 Watch Movement |url=https://calibercorner.com/tissot-caliber-powermatic-80/ |access-date=2024-10-26 |website=calibercorner.com |language=en-US}}</ref> Today, the Powermatic 80 movement is mostly used by brands in the [[The Swatch Group|Swatch Group]], like [[Tissot]], [[Hamilton Watch Company|Hamilton]] and [[Certina]].<ref>{{Cite web |last=Knapwerth |first=Fiona |date=2023-08-14 |title=Powermatic 80 movement |url=https://www.uhrinstinkt.com/magazine/powermatic-80-movement/ |access-date=2024-10-26 |website=Uhrinstinkt Magazine |language=en-US}}</ref> 

The accuracy of the movement is said to be -2 / +8 sec. per day.