Nautilus 5711: 3K vs ZF Factory

The Patek Philippe Nautilus 5711 is one of the most coveted luxury steel watches in history. For 1:1 super clones of the 5711, two powerhouses lead the pack: 3K Factory (3KF) and ZF Factory. Here is our direct head-to-head comparison.

Case Thickness: The Nautilus\'s Greatest Secret

The real Nautilus is incredibly thin, measuring only 8.3mm. Achieving this thinness with an automatic date movement is a massive challenge for replica factories.

• 3K Factory: Measures exactly 8.3mm thick. This is because 3KF has engineered a true custom 1:1 clone of the Patek Calibre 324 SC movement, which is ultra-slim.
• ZF Factory: Measures approximately 8.6mm thick. Earlier versions of ZF utilized a modified Miyota 9015 movement with decorative plates on top, which added bulk. Newer versions have improved, but 3KF remains the champion of slimness.

The Movement Battle: Clone 324 SC vs. Decorated Miyota

If you enjoy looking at the movement through the exhibition case back, here is how they differ:

• 3K Factory (Clone Calibre 324 SC): The movement gears are fully functional, meaning the balance wheel, geartrain, and rotor match genuine layouts exactly. It is virtually silent and features beautiful engraved (rather than stamped) gold lettering.
• ZF Factory (Miyota-Based / VR324): Highly reliable, but the rotor makes a distinct "spinning" or "whirring" noise (common to Miyota 9015 movements) when you move your arm. The gear bridges are decorative plates glued on top, making it slightly less convincing under a loupe.

Dials: Blue and Green Color Sunburst

This is where the tide turns. The Nautilus dial is famous for its horizontal grooves and color-shifting sunburst (shifting from blue to grey-green depending on light).

• ZF Dial: Widely considered to have the superior blue dial color. It matches the authentic Patek steel-blue hue with a perfect, subtle gradient transition. ZF's date font is also slightly cleaner.
• 3K Dial: Outstanding, but the blue dial has a slightly more prominent purple/blue tint under bright fluorescent lights compared to the genuine watch.

Summary: Which Nautilus to Buy?

If you want the absolute thinnest case (8.3mm) and a silent, 1:1 clone movement, buy from 3K Factory. If you want the most accurate dial color and gradients, and do not mind a slightly louder rotor, go with ZF Factory. Both are masterpieces and represent the absolute peak of Patek Philippe replication.