This Sort of design has a long history at Patek, courting back again towards the early 1960s With all the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Palms-On Together with the 5164R in 2019, the movement in the 2597 originated within the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/