This Type of style has an extended heritage at Patek, relationship again to your early nineteen sixties Using the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Hands-On Together with the 5164R in 2019, the motion from the 2597 originated through the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/