This Kind of style has an extended background at Patek, courting back again to the early 1960s with the ref. 2597 Travel Time Calatrava. As James Stacey mentioned in his Arms-On Together with the 5164R in 2019, the movement within the 2597 originated from the brain of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/