This Type of style and design has a lengthy record at Patek, dating again on the early 1960s With all the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Fingers-On 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/