This Type of style has a lengthy heritage at Patek, courting again to your early nineteen sixties with the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Hands-On Along with the 5164R in 2019, the movement from the 2597 originated with the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/