Such A style has a long history at Patek, dating again into the early nineteen sixties Together with the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Hands-On with the 5164R in 2019, the motion from the 2597 originated from your mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/