This Type of structure has an extended heritage at Patek, dating back again into the early nineteen sixties Using the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Palms-On Along with the 5164R in 2019, the movement inside the 2597 originated with the brain of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/