This Sort of structure has a protracted record at Patek, courting back again on the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey described in his Arms-On Using the 5164R in 2019, the movement while in the 2597 originated in the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/