This Sort of structure has an extended background at Patek, courting again to your early nineteen sixties Along with the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Fingers-On Using the 5164R in 2019, the motion from the 2597 originated through the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/