ETA SA 107

Caliber 107 is a quartz digital chronograph movement manufactured by ETA SA. Launched in 1979 and now discontinued, it was produced in Switzerland and features zero jewels, typical for quartz movements of this era. The defining characteristic is a pusher on the side of the case for time setting, a notable deviation from standard crown-based adjustment. This movement powered the Heuer Senator GMT watches produced between 1979 and 1982.