This Type of layout has a lengthy historical past at Patek, relationship back again to your early 1960s Using the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Fingers-On While using the 5164R in 2019, the movement during the 2597 originated with the mind of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/