This Type of style has a long background at Patek, relationship back again for the early sixties Together with the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Fingers-On Using the 5164R in 2019, the movement while in the 2597 originated from the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/