Such A style has a long heritage at Patek, courting back to your early 1960s Together with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Fingers-On With all the 5164R in 2019, the movement while in the 2597 originated through the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/