This Type of style has a lengthy background at Patek, dating again on the early sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Hands-On with the 5164R in 2019, the motion during the 2597 originated through the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/