Such A style has a long history at Patek, dating back again on the early sixties Together with the ref. 2597 Travel Time Calatrava. As James Stacey described in his Palms-On Together with the 5164R in 2019, the motion from the 2597 originated from the head of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/