Such A design and style has a lengthy background at Patek, courting again to the early sixties Using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Arms-On with the 5164R in 2019, the motion while in the 2597 originated from the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/