This Sort of style has a lengthy history at Patek, relationship again on the early sixties Using the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Palms-On Together with the 5164R in 2019, the movement in the 2597 originated in the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/