3K Factory Edition — Black Leather Strap
The 3K Factory (3KF) iteration of the Nautilus 5711 on a leather strap represents a definitive technical milestone in replica horology. By engineering a true 1:1 clone of the Caliber 324SC, 3KF has successfully bypassed the dimensional limitations of off-the-shelf Miyota movements. This proprietary architecture allows the case to achieve a verified 8.1mm thickness, aligning precisely with genuine specifications.
Powered by the integrated 324SC clone caliber, the movement features correct bridge layouts, simulated Gyromax balance profiling, and accurate perlage finishing. It operates at 28,800 vph and delivers approximately 36 hours of power reserve. The central rotor is engraved with the signature Calatrava cross, matching the OEM visual footprint.
Constructed from solid 316L stainless steel, the 40mm case weighs exactly 80.7g when paired with the black leather strap and deployant clasp. The grey textured dial accurately replicates the iconic horizontal embossing, while the alternating brushed and polished finishing on the bezel demonstrates tight manufacturing tolerances.
- Movement: Caliber 324SC Clone — Approximately 36 hours
- Case Material: 316L Stainless Steel, 40mm diameter, 80.7g weight
- Bezel: 316L Stainless Steel, brushed face with polished chamfers
- Crystal: Scratch-proof sapphire crystal with clear AR coating
- Bracelet: Black Leather Strap with deployant clasp
- Water Resistance: >50 Meters — professional pressure test recommended before swimming
This reference is suited for the collector who prioritizes exact case dimensions and movement architecture over factory-standard steel bracelets. The leather strap configuration offers a lighter, more understated profile for daily wear.

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