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Description
BBF Hublot Spirit of Big Bang 642.OM.0180.RX
A highly technical tonneau replica distinguished by its accurate King Gold plating and complex case construction.
Powered by Clone HUB 4700
The movement inside the BBF 642.OM.0180.RX is a carefully modified Asian 7750, decorated to replicate the skeletonized aesthetics of the genuine HUB 4700. While the genuine caliber is based on a high-beat Zenith El Primero architecture, this clone adapts the 7750 to provide reliable chronograph functions and proper sub-dial spacing. The skeletonized top plates are finished with perlage and sandblasted textures to match the industrial look of the authentic piece.
±10–15 s/day (Standard A7750 base movement tolerance).
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Chronograph, skeletonized date display
- ✅ Winding Direction: Unidirectional
Technical Specifications
Multi-layered sandwich construction featuring a mix of brushed and polished surfaces, accurately capturing the 42mm tonneau profile.
Exposes the decorated movement plates with dark grey and black structural accents. Features applied indices with correct lume application.
Matte black ceramic fixed bezel secured by six recessed, H-shaped titanium screws, offering high scratch resistance.
Lined black rubber strap integrating seamlessly into the case lugs, fastened by a King Gold PVD deployant buckle.
Why BBF for This Reference?
Many collectors ask: “Why not ZF or V6F?”
BBF is currently the premier choice for the Spirit of Big Bang due to their mastery of the proprietary King Gold alloy tone. While other factories often produce a rose gold tone that is too yellow or brassy, BBF achieves the correct coppery-red hue. Furthermore, BBF’s tolerances on the ceramic bezel integration and H-screw alignment are noticeably tighter.
Full Disclosure: The skeletonized date wheel font is marginally thicker than the genuine counterpart, and the unidirectional A7750 rotor can exhibit a slight audible whirring noise during rapid wrist movement.
Data Sheet
| MODEL REFERENCE | 642.OM.0180.RX |
| FACTORY / VERSION | BBF Edition |
| MOVEMENT | Clone HUB 4700 |
| CASE MATERIAL | 316L Steel with King Gold PVD and Ceramic |
| WEIGHT & THICKNESS | [unconfirmed] | [unconfirmed] |
| CRYSTAL & LUME | Sapphire with Anti-reflective Treatment | Standard Super-LumiNova |
| DIMENSIONS | 42MM × [unconfirmed] × [unconfirmed]Manual measurements — minor tolerances apply. |
| WATER RESISTANCE | 30m stated rating — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the chronograph function exactly like the genuine HUB4700?
A: The BBF utilizes a modified A7750 movement. While the chronograph is fully functional, it operates at 28,800 vph rather than the genuine’s 36,000 vph, meaning the seconds hand sweep is slightly less smooth.
Q: How accurate is the King Gold tone on the BBF edition?
A: BBF has achieved a highly accurate proprietary King Gold hue, which contains more copper tones than standard rose gold, avoiding the overly yellow look often found on budget replicas.
Q: Can I swap the rubber strap with genuine Hublot bands?
A: Yes, the BBF case replicates the genuine attachment dimensions closely enough that genuine Hublot Spirit of Big Bang 42mm straps will fit with minimal to no modification.
Q: What is the main known flaw of this specific BBF model?
A: The skeletonized date wheel font is marginally thicker than the genuine counterpart. Additionally, because it uses an A7750 base, the unidirectional rotor can exhibit a slight audible whirring noise during rapid wrist movement.
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