This Sort of structure has a long history at Patek, dating back again on the early 1960s with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Arms-On Along with 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/