This Sort of design has a long history at Patek, relationship back towards the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Palms-On Along with the 5164R in 2019, the movement inside the 2597 originated from the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/