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