Reference 3579 is a quieter take on the Calatrava, bringing Patek Philippe's dress-watch design into stainless steel with a more architectural case. The silver dial keeps it clean and spare. At 33mm wide and 7mm thick, the proportions are what collectors look for in a vintage manual-wind Patek. On an alligator strap, it has the easy formality that suits the Calatrava line.