This Type of style has a protracted record at Patek, relationship again to your early nineteen sixties Together with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Palms-On Together with the 5164R in 2019, the movement in the 2597 originated with the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/