This Kind of style has a lengthy historical past at Patek, dating again towards the early 1960s Using the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Fingers-On Along with the 5164R in 2019, the movement during the 2597 originated through the brain of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/