This Sort of layout has a long record at Patek, dating again towards the early 1960s While using the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Arms-On Using the 5164R in 2019, the movement from the 2597 originated from the mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/