This Type of style has an extended historical past at Patek, dating again on the early 1960s Using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Palms-On With all the 5164R in 2019, the movement in the 2597 originated with the intellect of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/