This Sort of design has a long background at Patek, relationship again for the early sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Arms-On While using the 5164R in 2019, the movement during the 2597 originated in the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/