Such A structure has an extended record at Patek, relationship back again for the early 1960s While using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Arms-On Together with the 5164R in 2019, the movement from the 2597 originated from the brain of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/