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Description
BBF Hublot Spirit of Big Bang Titanium Pavé 42mm
The BBF release stands as the horological benchmark for the tonneau-shaped Spirit of Big Bang, offering an uncompromised HUB4700 movement clone and precise titanium sandwich construction.
Powered by Clone HUB 4700
The Clone HUB 4700 automatic chronograph movement represents a sophisticated engineering effort to mimic Hublot’s heavily modified Zenith El Primero base. BBF has successfully replicated the intricate skeletonization of the top plate, allowing the exposed date wheel to be fully visible through the sapphire dial. The movement utilizes a customized rotor and correctly finished bridges to maintain visual fidelity when inspected through the exhibition caseback. While it operates at a standard 28,800 vph rather than the genuine’s 36,000 vph high-beat frequency, the reliability of this clone architecture ensures stable long-term chronograph functionality.
Properly regulated, this clone HUB 4700 caliber typically performs within ±10–15 seconds per day, with stable amplitude across varying positional testing.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: 12-hour chronograph, running seconds at 9 o’clock, skeletonized date display at 4:30
- ✅ Winding Direction: Unidirectional (clockwise)
Technical Specifications
The 42mm tonneau case utilizes the correct sandwich construction, blending lightweight titanium with lateral resin inserts. The case profile matches the genuine curvature, ensuring an ergonomic fit despite the substantial footprint.
The transparent sapphire dial exposes the intricate mechanics beneath, featuring applied indices with luminescent fill. The skeletonized date ring aligns precisely within the aperture, avoiding the depth flaws seen on lesser versions.
Secured by six polished H-shaped titanium screws, the bezel is meticulously set with synthetic stones. The alignment of the screws strictly follows the genuine Hublot orientation, avoiding the random placement found on lower-tier replicas.
Constructed from high-grade customized fluororubber, the strap repels dust and resists degradation. The titanium deployant clasp features crisp engravings and locks securely with precise tolerances.
Why BBF for This Reference?
Many collectors ask: “Why not standard market versions?”
BBF dominates the Spirit of Big Bang category because they engineer the case specifically for the HUB4700 clone, rather than forcing a generic movement into an oversized case. Their proprietary one-button quick-release strap system is functionally identical to genuine, offering smooth engagement without the sticking or jamming issues prevalent in cheaper iterations.
Full Disclosure: The synthetic pavé stones, while well-set, do not possess the identical refractive index or brilliance of genuine VVS diamonds under direct sunlight, and the modified 7750-base rotor exhibits minor but noticeable unidirectional winding noise.
Data Sheet
| MODEL REFERENCE | 642.NX.0170.RX.1704 |
| FACTORY / VERSION | BBF Edition |
| MOVEMENT | Clone HUB 4700 Automatic |
| CASE MATERIAL | Grade 5 Titanium & Resin with Pavé Setting |
| WEIGHT & THICKNESS | [unconfirmed] g | [unconfirmed] mm |
| CRYSTAL & LUME | Sapphire with AR Coating | Super-LumiNova |
| DIMENSIONS | 42mm × [unconfirmed] × [unconfirmed]Manual measurements — minor tolerances apply. |
| WATER RESISTANCE | 30m Stated — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the BBF quick-release strap system accept genuine Hublot straps?
A: Yes, the BBF one-button quick-change mechanism is engineered to exact tolerances, allowing it to securely accept genuine Hublot Spirit of Big Bang 42mm straps without modification.
Q: Is the chronograph fully functional on this Clone HUB 4700 movement?
A: Yes, the chronograph operates fully. The central hand tracks seconds, while the sub-dials accurately record elapsed minutes and hours. However, frequent use of the chronograph will significantly deplete the 36-hour power reserve.
Q: Are the stones on the titanium case real diamonds?
A: No, the BBF edition utilizes high-quality synthetic cubic zirconia (CZ) stones to replicate the pavé setting. While they offer excellent clarity and are set securely, they do not possess the same refractive properties as the natural VVS diamonds used by Hublot.
Q: What is a known quirk of the BBF Spirit of Big Bang movement?
A: Because the Clone HUB 4700 is heavily modified from a base automatic chronograph architecture, the winding rotor can exhibit noticeable unidirectional spinning noise. This is a standard characteristic of this movement clone and not a mechanical defect.
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