This Kind of structure has a long heritage at Patek, dating again to the early nineteen sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey described in his Arms-On Together with the 5164R in 2019, the motion within the 2597 originated through the thoughts of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/