Such A style has a long heritage at Patek, relationship again to your early 1960s With all the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Arms-On Along with the 5164R in 2019, the movement during the 2597 originated from your mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/