This Kind of style has a long history at Patek, courting back again into the early 1960s While using the ref. 2597 Travel Time Calatrava. As James Stacey described in his Palms-On with the 5164R in 2019, the movement in the 2597 originated from your head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/