This Type of style and design has a long history at Patek, courting again to your early sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Palms-On Using the 5164R in 2019, the motion in the 2597 originated in the thoughts of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/