This Sort of layout has an extended heritage at Patek, relationship back again for the early 1960s with the ref. 2597 Travel Time Calatrava. As James Stacey pointed out in his Palms-On Along with the 5164R in 2019, the motion from the 2597 originated in the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/