This Kind of style has a long history at Patek, dating back towards the early sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Arms-On Along with the 5164R in 2019, the movement inside the 2597 originated through the brain of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/