This Sort of layout has an extended heritage at Patek, dating back to the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Hands-On While using the 5164R in 2019, the movement inside the 2597 originated from your mind of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/