This Type of style has a lengthy heritage at Patek, courting again into the early 1960s Along with the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Hands-On While using the 5164R in 2019, the movement while in the 2597 originated with the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/