This Type of style and design has a long background at Patek, courting back to the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Palms-On with the 5164R in 2019, the movement inside the 2597 originated within the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/