This Sort of layout has a long heritage at Patek, courting again to the early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Hands-On Together with the 5164R in 2019, the motion within the 2597 originated with the mind of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/