A beauty, Jaquet Droz Automatic Ref. 24580 from ca. 1970's with calendar date and a ETA 2783 with 25 jewels for caliber.
Info about the specs of the ETA Cal. 2783; here.
If you want to read more about the history of Jaquet Droz; here. and here.;
⚜ The founder Pierre Jaquet-Droz (more info; here.) ⚜