The Patek Philippe Nautilus 5711/1A-010 — the blue dial stainless steel reference — became one of the most desired watches in the world before its discontinuation in 2021. Designed by Gérald Genta with its distinctive porthole case and integrated bracelet, the Blue Nautilus defined the luxury sports watch category. With retail prices that never reflected secondary market demand, the 5711 trades at a significant premium. DeMesy & Co. sources pre-owned Patek Philippe Blue Nautilus watches for serious collectors — each authenticated by our Dallas team with nearly 40 years of experience.