3K Factory (3KF) Edition — Black Leather Strap
The 3K Factory (3KF) edition of the Nautilus 5711 stands as a definitive benchmark in horological replication, primarily due to its true 1:1 integrated movement architecture. By eliminating the need for decorative plates over a base caliber, 3KF achieves the exact 8.3mm case thickness of the genuine piece, a feat that completely transforms the wrist presence compared to older iterations.
At the heart of this model is the custom SC 26-330 (or Cal. 324 on select batches) integrated clone caliber. Unlike standard replicas, this mechanism features a fully separated structure where the shock absorbers, gears, and jewel bearings serve actual transmission functions rather than mere decoration. Power reserve is rated at approximately 36 hours, beating at a smooth 28,800 bph (4Hz) while showcasing perlage and côtes de Genève finishing that closely mimics the genuine article.
The case is machined from premium stainless steel, measuring precisely 40.0mm in diameter with a refined brushed and polished finish. The olive green dial is a standout, featuring the correct horizontal embossed pattern and a sunburst effect that shifts from deep forest to vibrant emerald depending on the lighting. Paired with a black leather strap, this configuration offers a distinctly sophisticated, dress-oriented aesthetic.
- Movement: Integrated Clone SC 26-330 / Caliber 324 — Approximately 36 hours
- Case Material: 316L Stainless Steel, 40.0mm diameter, 8.3mm thickness, 80g weight
- Bezel: Stainless steel, alternating brushed and mirror-polished finish
- Crystal: Scratch-proof sapphire crystal with colorless AR coating
- Bracelet: Black alligator-pattern leather strap with Nautilus fold-over clasp
- Water Resistance: 30 Meters (Factory Tested) — professional pressure test recommended before swimming. Do not operate chronograph pushers or the crown while the watch is submerged.
This specific 5711 configuration caters to the collector who appreciates the Nautilus silhouette but prefers the understated elegance of leather over an integrated steel bracelet. It seamlessly transitions from formal boardroom settings to smart-casual evening wear.

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