This Type of layout has a protracted history at Patek, courting back again into the early 1960s While using the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Palms-On With all the 5164R in 2019, the movement while in the 2597 originated within the brain of Louis https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/