This Type of structure has an extended heritage at Patek, dating back on the early 1960s Together with the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Hands-On Together with the 5164R in 2019, the motion while in the 2597 originated within the thoughts of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/