This Type of structure has a lengthy historical past at Patek, courting back again into the early sixties with the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Palms-On Using the 5164R in 2019, the motion in the 2597 originated within the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/