The ETA 2824-2 may be the most-used mechanical Swiss watch movement in the world. Available in five grades, the 2824 truly deserves it's title of 'tracteur.'
You'll see it in watches ranging from about $300 on up into several thousand dollars, and into the tens of thousands when heavily modified (e.g. Ulysse Nardin) or when paired with Dubois-Dupraz modules such as chronographs or perpetual calendars.
Now that the patents have expired it's been cloned by
- Sellita as the SW200
- Fossil as the STP 1-11.
- Seagull as the ST21
- Hangzhou as the Hangzhou 6000
- Liaoning as the SL3000.
- Valanvron as the Valanvron 24.
Almost certainly by other companies as well.
The specs have changed over the years, but here is a current snapshot:
- 25.6mm by 4.6mm (11.5 ligne)
- Handwinding and hacking, though some grades lack hacking
- Quickset date
- 25 jewels, Etachocs
- Regulation varies by grade, up to 5 positions and temperature for the chronometer grade.
- Power reserve: 40 hours
- Nice in-depth article
- ETA the company
- ETA PDF on finishes
- Comparison of ETA original with Seagull and Hangzhou clones