This Sort of layout has a long background at Patek, courting back again into the early sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Fingers-On While using the 5164R in 2019, the motion from the 2597 originated within the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/