This Sort of style has a long history at Patek, relationship back again towards the early sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Arms-On Using the 5164R in 2019, the movement in the 2597 originated from the intellect of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/