This Sort of structure has an extended history at Patek, relationship back for the early sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Arms-On Using the 5164R in 2019, the movement during the 2597 originated in the mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/