This Type of layout has a protracted heritage at Patek, dating back again into the early sixties with the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Fingers-On Together with the 5164R in 2019, the motion during the 2597 originated within the brain of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/