Such A layout has a long heritage at Patek, courting back again towards the early 1960s with the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Palms-On with the 5164R in 2019, the movement inside the 2597 originated with the intellect of Louis Cottier – The daddy https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/