This Type of layout has a lengthy record at Patek, courting back again for the early 1960s with the ref. 2597 Travel Time Calatrava. As James Stacey talked about in his Arms-On While using the 5164R in 2019, the movement in the 2597 originated within the head of Louis Cottier https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/