Such A layout has a lengthy history at Patek, relationship back again for the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Fingers-On Using the 5164R in 2019, the movement inside the 2597 originated from the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/