The Nautilus 5711 has always been the most popular sports model from Patek Philippe. In the replica watch industry, the Nautilus 5711 is also highly sought after, with many factories, such as BP, PF, PPF, and 3KF, producing them. Even some smaller, lesser-known factories are involved. Much like the replicas of Rolex Submariner and Daytona, the quality of the Patek Nautilus 5711 replicas has significantly improved in recent years, thanks to the contributions of PPF and 3KF. Their replicas are far superior to those from other factories. Currently, the Nautilus 5711 has been updated to V4, and 3KF’s version has reached V2.