This Sort of design and style has a long history at Patek, relationship again to your early 1960s Using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Arms-On While using the 5164R in 2019, the movement in the 2597 originated within the brain of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/