This Kind of structure has a protracted history at Patek, dating back again towards the early sixties with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Arms-On Together with the 5164R in 2019, the movement in the 2597 originated from your intellect of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/