This Sort of structure has an extended heritage at Patek, dating back on the early sixties Together with the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Palms-On Using the 5164R in 2019, the motion during the 2597 originated from the brain of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/