This replica big bang 5120 45mm uses a titanium case with a dark color scheme under reference 411.EX.5120.NR, where the NR suffix designates the black rubber strap. At 45mm, satin-finished titanium provides the lightest option in the Unico chronograph family. The EX material code points to polished and satin titanium, and the 5120 dial reference indicates a dark-toned configuration. Hublot uses titanium across the Big Bang line for buyers who want 45mm diameter without the wrist fatigue that steel or gold produce during all-day wear.

Key Specifications

• Case diameter: 45mm
• Case material: polished and satin-finished titanium
• Bezel: titanium with 6 H-shaped screws
• Crystal: sapphire with anti-reflective coating
• Dial: skeleton with visible Unico movement architecture
• Strap: black rubber with titanium deployment buckle
• Movement: Unico automatic flyback chronograph
• Functions: hours, minutes, flyback chronograph, date, visible column wheel

Titanium weighs roughly 40 percent less than stainless steel at equivalent dimensions, which means this 45mm case sits noticeably lighter on the wrist than the steel 441 references in the same collection.

Design & Finishing

The satin-finished surfaces across the case and bezel give the titanium a muted, industrial aesthetic that contrasts with the mechanical complexity visible through the skeleton dial. The Unico column wheel sits at 6 o’clock, and the chronograph coupling mechanism occupies the 12 o’clock position. Subdials for running seconds and chronograph minutes frame the central axis. The rubber strap uses a folding clasp in matching titanium, maintaining material consistency from case to buckle. For a radically different expression on the same Unico base, the 46mm 418.FX.8007 Sang Bleu edition abandons the skeleton dial entirely for geometric artistry. Both options live within the Big Bang family and illustrate the range of design directions this platform supports.

On the Wrist

Titanium at 45mm makes the Unico a realistic daily-wear chronograph rather than a weekend showpiece. You get the full mechanical theater of the skeleton dial, flyback chronograph function, and the oversized case presence without weight penalty. The dark color scheme keeps everything understated by Big Bang standards, broadening the occasions where this piece works. Compared to king gold and diamond-set Unico variants, this titanium reference represents the purist approach. This replica big bang 5120 45mm focuses on the movement and materials without any gemstone or precious-metal distraction.