The Sellita SW500 is an automatic chronograph movement produced by Sellita. It is based on the popular Valjoux 7750 design, which Sellita has long produced along with ETA. In 2012, TAG Heuer began sourcing the SW500 as an alternative to the Valjoux 7750, naming both "Calibre 16".
- Oris Cal. 771 - SW 510 bi-compax
- Alpina AL-860 - Bi-compax modification and in-house finishing
- Alpina AL-880 - Regatta countdown module and in-house finishing
- TAG Heuer Calibre 16
- IWC 75320