This Kind of design has a protracted background at Patek, courting again to the early 1960s With all the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Palms-On Using the 5164R in 2019, the motion in the 2597 originated with the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/