This Kind of design has a lengthy record at Patek, dating back again into the early 1960s Along with the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Palms-On Using the 5164R in 2019, the movement during the 2597 originated within the thoughts of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/