This Kind of design has a protracted historical past at Patek, courting again to your early sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey described in his Fingers-On Using the 5164R in 2019, the movement in the 2597 originated from your mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/