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Description
BBF Hublot Spirit of Big Bang King Gold Blue Ceramic 42mm 642.OL.7180.RX
A technically proficient execution of Hublot’s complex tonneau architecture, balancing material accuracy with reliable chronograph functionality.
Powered by Clone HUB 4700 Automatic
The HUB 4700 clone movement in this BBF edition is a heavily modified Asian 7750, re-engineered to display the skeletonized aesthetic of the original. Custom decorative plates and a skeletonized rotor mimic the intricate depth of the genuine caliber. While the beat rate differs from the authentic high-frequency Zenith El Primero base, the chronograph functions remain fully operational with crisp pusher engagement.
±10–15 s/day (Standard tolerance for Asian automatic chronograph calibers).
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Hours, minutes, small seconds, date, and 12-hour chronograph
- ✅ Winding Direction: Unidirectional
Technical Specifications
The 42mm tonneau case exhibits alternating satin-finished and polished surfaces, integrating seamlessly with the blue ceramic components and signature H-shaped screws.
The multi-layered dial features visible date wheel mechanics and faceted hands, with a deep blue outer minute track and sub-dial rings aligning with genuine geometry.
The blue ceramic bezel insert is secured by six flush, polished titanium H-shaped screws, offering excellent scratch resistance and correct color depth.
The blue lined rubber strap features a functional ‘One Click’ quick-release system and a robust deployant clasp with precise locking tolerances.
Why BBF for This Reference?
Many collectors ask: “Why not other factories?”
BBF has mastered the complex geometry of the Spirit of Big Bang case. Their replication of the proprietary King Gold tone is notably less brassy than earlier iterations from competing makers, offering a warmer, more authentic rose gold hue.
Full Disclosure: The decorative movement plates, while visually impressive, lack the microscopic finishing quality and chamfering seen under a loupe on the genuine HUB4700 caliber.
Data Sheet
| MODEL REFERENCE | 642.OL.7180.RX |
| FACTORY / VERSION | BBF Edition |
| MOVEMENT | Clone HUB 4700 Automatic |
| CASE MATERIAL | 18k King Gold Plated 316L Steel / Blue Ceramic |
| WEIGHT & THICKNESS | [unconfirmed] | 14.1mm |
| CRYSTAL & LUME | Sapphire with AR Treatment | Super-LumiNova |
| DIMENSIONS | 42.0mm × 51.0mm × 14.1mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE | 30m stated — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the chronograph function work on the BBF Clone HUB 4700 movement?
A: Yes, the chronograph is fully functional. The sub-dials track elapsed minutes and hours, and the central seconds hand operates as the chronograph sweep.
Q: Is the case solid 18k gold or plated?
A: The case is constructed from a 316L stainless steel core that has been heavily plated with an 18k King Gold (rose gold) alloy tone to match Hublot’s proprietary color.
Q: Does the quick-release strap system function like the genuine Hublot?
A: Yes, the BBF edition replicates the ‘One Click’ quick-release mechanism, allowing you to swap straps efficiently by pressing the trapezoidal pushers on the lugs.
Q: What is the main visual tell on this replica compared to the genuine 642.OL.7180.RX?
A: The primary tell lies in the movement finishing. While the skeletonized architecture is accurately replicated at a glance, the genuine piece uses a high-beat Zenith El Primero base with superior beveling and perlage on the bridges that this modified Asian clone does not fully capture under magnification.
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