• SW500 a: Day, Date
• SW500 b: Date
• SW500 c: No Date

The SW500 family was launched in 2009 just after the SW200 (ETA 2824 clone) and SW300 (ETA 2892 clone). Sellita had long been a contract manufacturer for ETA, building and re-selling the 2600, 2800, 2890, and 7001 series until 2008. Although they did not list the 7750 in their catalog, they were able to secure components from suppliers to begin production on their clone movement just a few years after shifting to “in-house” manufacturing.

In 2017, Sellita introduced the SW510 series, a clone of the ETA 7753 with a 3-6-9 subdial layout. This movement may have been in use earlier but this was the first public use of the SW510 name.

2018 saw a massive expansion of the SW500 line, with hand-winding “M” movements added along with monopusher “MP” and “MPC” movements. This was also the debut of the time-and-date SW600 and SW690 movements. In all, over a dozen new variants were introduced. 2019 saw a further expansion with 8 more variants. In all, over four dozen different movements are offered as of 2020.