This Sort of structure has a lengthy record at Patek, courting back again to your early nineteen sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey described in his Fingers-On with the 5164R in 2019, the motion within the 2597 originated through the thoughts of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/