This Sort of structure has a protracted heritage at Patek, relationship again to your early 1960s With all the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Fingers-On with the 5164R in 2019, the motion within the 2597 originated in the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/