This Kind of style has a protracted background at Patek, courting back again for the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Hands-On While using the 5164R in 2019, the movement from the 2597 originated through the brain of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/