This Sort of layout has a lengthy history at Patek, dating back for the early 1960s Together with the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Hands-On While using the 5164R in 2019, the motion within the 2597 originated from the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/