This Sort of structure has an extended historical past at Patek, courting back towards the early 1960s Along with the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Fingers-On Along with the 5164R in 2019, the movement within the 2597 originated from the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/