This Type of design has a protracted historical past at Patek, relationship back to the early sixties While using the ref. 2597 Travel Time Calatrava. As James Stacey stated in his Fingers-On With all the 5164R in 2019, the movement during the 2597 originated within the mind of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/