This Type of layout has a protracted heritage at Patek, courting again on the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Fingers-On Together with the 5164R in 2019, the motion from the 2597 originated through the intellect of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/