This Sort of layout has a long record at Patek, dating back again on the early 1960s Using the ref. 2597 Travel Time Calatrava. As James Stacey described in his Fingers-On Together with the 5164R in 2019, the movement during the 2597 originated within the brain of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/