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Description
ZF Factory Tudor Black Bay Monochrome M7941A1A0NU-0003
The most structurally accurate replication of the modernized 41mm Black Bay, highlighted by a heavily refined case profile and a meticulously articulated 5-link bracelet.
Powered by Asian Custom Automatic Caliber
The engine driving this Monochrome edition is a robust Asian custom automatic mechanical movement, specifically configured for a symmetrical no-date dial layout. Select batches feature aesthetic modifications to mimic the genuine MT5602-U topology, though the underlying architecture remains a proven, easily serviceable workhorse. Each movement undergoes rigorous testing to meet prior to final assembly, ensuring stable beat rates and reliable daily performance.
Regulated to perform within ±10–15 seconds per day, consistent with high-grade Asian clone base calibers.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Hours, minutes, and sweeping seconds (no-date symmetry)
- ✅ Winding Direction: Bidirectional rotor winding
Technical Specifications
ZF has successfully reduced the case thickness to 13.6mm, matching the updated genuine geometry. The 21mm lug width features refined chamfering, while the crown tube is now correctly finished in bare steel, eliminating the older colored spacer.
The dial abandons all vintage warmth, utilizing pure white Super-LumiNova and silver-edged applied indices. The iconic Snowflake hands are rhodium-plated, offering sharp contrast against the profound matte black background.
A 60-click unidirectional stainless steel bezel houses a black aluminum insert with silver timing markers. The outer coin-edge knurling has been cut deeper than previous iterations for improved tactile grip.
Constructed with alternating polished and brushed links, this bracelet provides excellent drape and wrist conformity. It secures via a folding clasp equipped with a functional T-fit style micro-adjustment system.
Why ZF Factory for This Reference?
Many collectors ask: Why not wait for mid-tier factories?
ZF was the first to accurately reverse-engineer the 2024 case revisions. While other factories often repurpose older 15mm thick 41mm cases for new dial releases, ZF invested in a completely new mid-case mold to achieve the critical 13.6mm thickness. Furthermore, ZF accurately captured the pure white lume tone, avoiding the residual yellow tint found in early competitor batches.
Full Disclosure: The T-fit style toolless micro-adjustment mechanism in the clasp lacks the silky, distinct ratcheting sensation of the genuine Tudor component, feeling slightly stiff during initial operation.
Data Sheet
| MODEL REFERENCE | M7941A1A0NU-0003 |
| FACTORY / VERSION | ZF Factory Edition |
| MOVEMENT | Asian Custom Automatic Caliber |
| CASE MATERIAL | 316L Stainless Steel |
| WEIGHT & THICKNESS | 150g | 13.6 mm |
| CRYSTAL & LUME | Domed Sapphire with AR | Pure White Super-LumiNova |
| DIMENSIONS | 41 mm × 150g × 13.6 mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE | 50 meters — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the ZF Monochrome use the older, thicker 41mm Black Bay case?
A: No. ZF has updated the mid-case architecture specifically for the M7941A1A0NU-0003, reducing the overall thickness to approximately 13.6mm. This eliminates the slab-sided feel of previous generations and closely matches the 2024 genuine release.
Q: Are the dial indices and hands gold or silver?
A: They are entirely silver-toned (rhodium-plated). This Monochrome edition completely removes the vintage gilt accents and red bezel triangle found on classic Black Bay models, opting for a pure black, white, and silver palette.
Q: Is the crown tube colored like older Black Bay models?
A: No. Matching the genuine 2024 specifications, ZF has removed the colored aluminum crown tube spacer. The crown now sits flush against a standard bare steel tube.
Q: Does the replica’s T-fit clasp allow for toolless micro-adjustment?
A: Yes, the ZF folding clasp incorporates a functional toolless micro-adjustment system similar to the genuine T-fit. However, the sliding mechanism is inherently stiffer and lacks the refined, silky detents of the authentic Tudor clasp.
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