This Kind of design has a long historical past at Patek, courting back into the early sixties Using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Hands-On Along with the 5164R in 2019, the movement within the 2597 originated in the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/