This Type of layout has an extended history at Patek, dating again to your early nineteen sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Fingers-On Together with the 5164R in 2019, the motion inside the 2597 originated with the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/