Calibre A07.171 is an automatic GMT movement from ETA. It was introduced in 2006 and remains in production as of 2019.

Mechanical movement in the series ETA Valgranges with self-winding, ball-bearing rotor, unidirectional winding, 48 hours power reserve, hacking seconds device and second timezone.

The movements of the series Valgranges are an evolution of the famous Valjoux calibre 7750 (hence the name Valgranges, from “Granges” or Grenchen) and with 16½ lignes offer a larger diameter. Thus ETA also provides appropriate large-scale movements for the larger wristwatches that are increasingly common in our days.