This Type of structure has a long history at Patek, relationship back for the early nineteen sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Palms-On Together with the 5164R in 2019, the motion inside the 2597 originated through the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/