This Sort of layout has a long history at Patek, courting again to your early sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Fingers-On Using the 5164R in 2019, the motion during the 2597 originated within the thoughts of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/