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Description
BBF Hublot Square Bang Unico Titanium Ceramic 821.NM.0170.RX
A highly technical execution of Hublot’s barrel-shaped chronograph, notable for its fully functional flyback module and exact 159.2g weight.
Powered by Custom HUB1280 Clone
The engineering focus of this piece centers on the complex HUB1280 movement replication. Unlike standard chronographs, this caliber integrates a visible column wheel at the 6 o’clock position on the dial side, providing mechanical depth. The mechanism fully supports the flyback function, permitting the user to reset the chronograph without stopping the initial timing sequence. The skeletonized architecture is finished with precise matte sandblasting on the bridges, closely mirroring the genuine depth.
Regulated to approximately ±10–15 s/day, which is standard for heavily modified 7750-based flyback chronographs in this tier.
- ✅ Power Reserve: Approximately 36 hours
- ✅ Complications: Flyback Chronograph, skeletonized date display, sweeping sub-seconds
- ✅ Winding Direction: Unidirectional
Technical Specifications
Precisely milled to 42mm in diameter and exactly 15.9mm thick. The case features alternating brushed and polished facets that highlight the complex Square Bang geometry.
Features a transparent sapphire dial exposing the movement beneath, accented by matte dark tones and applied luminescent indices. The dial-side column wheel is fully visible and functional.
Secured by six H-shaped titanium screws, the ceramic bezel offers a muted, micro-blasted texture that contrasts sharply with the metallic chassis.
Equipped with Hublot’s signature One-Click quick-release mechanism, allowing seamless strap changes. Secured by a titanium deployant clasp.
Why BBF for This Reference?
Many collectors ask: “Why not generic 7750 builds?”
BBF is currently the only manufacturer offering a fully functional flyback module with a true dial-side column wheel for the Square Bang. Lower-tier alternatives rely on standard A7750 movements with faux column wheels glued to the dial, lacking the instantaneous reset capability and exhibiting incorrect case thickness.
Full Disclosure: Due to the complexity of the flyback module, the winding rotor exhibits slightly more bearing noise than a standard three-hand movement, and the date wheel font is marginally thicker than genuine under macro inspection.
LIVE PREVIEW
Data Sheet
| MODEL REFERENCE | 821.NM.0170.RX |
| FACTORY / VERSION | BBF Edition |
| MOVEMENT | Custom HUB1280 Clone |
| CASE MATERIAL | Grade 5 Titanium & Ceramic |
| WEIGHT & THICKNESS | 159.2g | 15.9mm |
| CRYSTAL & LUME | Sapphire with Double AR | Super-LumiNova |
| DIMENSIONS | 42mm × 50mm × 15.9mmManual measurements — minor tolerances apply. |
| WATER RESISTANCE | 50m stated — professional pressure test recommended before swimming |
Collector Q&A
Q: Does the flyback function operate exactly like the genuine HUB1280?
A: Yes. The BBF custom clone allows you to press the reset pusher while the chronograph is running, instantly returning the seconds hand to zero and restarting the timing sequence without stopping it first.
Q: Are the ‘One-Click’ strap buttons fully functional?
A: The quick-release system on the lugs is fully operational, allowing you to swap out the textured rubber strap without tools. It maintains compatibility with aftermarket straps designed for the Hublot One-Click system.
Q: How accurate is the weight compared to the authentic piece?
A: Due to the use of genuine titanium and ceramic components, the BBF edition weighs exactly 159.2g, which precisely mirrors the mass of the retail counterpart.
Q: What is the main limitation or known quirk of this specific BBF Square Bang?
A: While the movement architecture is highly accurate, the skeletonized date wheel font is slightly thicker than genuine under macro inspection, and the winding rotor exhibits minor bearing noise when shaken vigorously due to the heavy flyback module modification.
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