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