This Type of structure has an extended history at Patek, dating again to the early nineteen sixties With all the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Fingers-On With all the 5164R in 2019, the motion within the 2597 originated with the intellect of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/