This Type of structure has a lengthy history at Patek, dating back on the early nineteen sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Palms-On Together with the 5164R in 2019, the movement in the 2597 originated with the brain of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/