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