One is Nautilus 5712, which has moon phase display and power reserve indicator on the dial, the other is Nautilus 5711, which has a blue/gray dial. Which factory makes the best replica of each?
First for the Nautilus 5712, I highly recommend the one made by PPF, the latest version is V3, which was published by PPF on June, with upgradation on dial color and movement engravings. Many people bought the PPF Nautilus 5711 and did some modifications, like changing its dial, moon phase and date wheel. Before, I also suggested buy a PPF 5712 and replaced its dial, hands and moon phase with SW watch parts, but now I do not think this is a good idea, if these watch parts are not correctly installed by a very professional watch master, then the watch will often have issues in daily use, and it is very difficult for you to send the watch back for repairing.
The second watch is the Nautilus 5711 from BBF, which I think is better than the one made by 3K and PPF. Besides this blue/gray dial version, BBF also produces the white and green one, they are all good. The latest version is V2 now, the dial color, dial printing and grids are more accurate. The Nautilus 5711 also has a free-sprung balance wheel version made by DDF, do not buy this one, its movement not stable. By the way, the jewel bearing of the auto rotor on BBF 324 movement looks more authentic than the one on the 3K 330 movement.
Pictures of PPF Nautilus 5712









Pictures of BBF Nautilus 5711



























































































































