My father's Zenith De Luxe Automatic, vintage golden watch!

Hi guys,
I have this watch from the 60s or 70s, a golden Zenith, with markings as "De Luxe" and "automatic". It belonged to my father, but I don't know how he got it... I think perhaps it's a rare item, vintage design which is starting to look modern nowadays... :)
Does anyone know something about this kind of Zenith's?
Thanks!
Marc