This Sort of layout has an extended background at Patek, dating back again into the early sixties Using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Palms-On While using the 5164R in 2019, the movement during the 2597 originated in the mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/