This Sort of layout has a protracted history at Patek, dating back again to the early nineteen sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Palms-On with the 5164R in 2019, the motion in the 2597 originated with the mind of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/