Such A design has a long record at Patek, courting back again to your early nineteen sixties Together with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Hands-On Using the 5164R in 2019, the movement while in the 2597 originated through the brain of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/