The Hublot Big Bang Unico Titanium Blue is a 44 mm automatic flyback chronograph that combines Grade 5 titanium, an open-worked blue dial and Hublot’s manufacture HUB1280 UNICO movement. The calibre places key elements of the chronograph mechanism on the dial side, including its column wheel, making the mechanical architecture an integral part of the display. With a 72-hour power reserve, 100-meter water resistance and a lightweight titanium construction, this model combines the technical character of a modern sports chronograph with the visual complexity associated with contemporary skeleton watches.
Design
The Hublot Big Bang Unico Titanium Blue follows the bold proportions and layered architecture that define Hublot’s Big Bang collection. The case measures 44 mm in diameter and approximately 14.5 mm thick, giving the watch a substantial presence while the use of titanium keeps the construction lighter than an equivalent steel case. Satin-brushed surfaces dominate the exterior, complemented by polished areas and bevels that emphasize the geometry of the case. Black composite-resin inserts provide additional contrast within the multi-part construction.
The fixed titanium bezel combines satin-finished and polished surfaces and is secured by 6 exposed H-shaped screws, one of the most recognizable elements of the Big Bang design. Beneath it, the matte blue skeleton dial exposes a substantial portion of the movement. Applied Arabic numerals and baton-style hour markers sit above the mechanical structure, while broad silver-toned hands with luminous inserts provide contrast against the blue and metallic components. A blue peripheral flange carries the minute and chronograph seconds markings.
The chronograph display is integrated into this open architecture rather than visually separated from it. A 60-minute chronograph counter occupies the 3 o’clock position, while small seconds are displayed at 9 o’clock. The date indication is incorporated around the 3 o’clock area, and the column wheel can be observed from the dial side. Sapphire crystal with anti-reflective treatment protects the display, while the blue structured rubber strap continues the dial’s color scheme and integrates directly into Hublot’s proprietary attachment system.
Case & Construction
The case of the Hublot Big Bang Unico Titanium Blue is manufactured primarily from Grade 5 titanium, complemented by composite-resin inserts within its modular construction. Hublot favors Grade 5 titanium for its combination of mechanical strength, low weight, corrosion resistance and suitability for prolonged skin contact. Satin and polished finishes are applied across the case and bezel to distinguish the different structural surfaces.
The case measures 44 mm in diameter, approximately 14.5 mm thick and around 52 mm from lug to lug. Instead of conventional lugs with a standard numerical lug width, the watch uses Hublot’s proprietary One-Click quick-release strap system, allowing compatible dedicated straps to be removed and exchanged without traditional spring-bar tools.
The dial is protected by sapphire crystal with anti-reflective treatment, while the transparent caseback provides another view of the mechanical movement. The crown and chronograph pushers occupy the right side of the case. Water resistance is rated at 100 meters (10 ATM), providing useful protection for everyday wear and normal recreational contact with water.
Movement
The Hublot Big Bang Unico Titanium Blue is powered by the Hublot Manufacture HUB1280 UNICO, an in-house Swiss automatic mechanical chronograph calibre equipped with a silicon escapement, flyback functionality and column-wheel control. Automatic winding uses the motion of the wearer’s wrist to replenish the mainspring, while the movement provides approximately 72 hours of power reserve when fully wound. It operates at 28,800 vibrations per hour (4 Hz), uses 43 jewels and consists of 354 components.
The use of silicon within the escapement contributes to the modern technical architecture of the HUB1280. Silicon is lightweight, resistant to magnetism and requires less lubrication than conventional metallic components in comparable applications, characteristics that can support efficient and consistent operation over time. The calibre was developed by Hublot as a more compact evolution of the original UNICO architecture while retaining its integrated automatic chronograph construction and substantial 3-day power reserve.
One of the HUB1280’s defining characteristics is the positioning of the column wheel on the dial side, where it can be observed through the skeletonized display. The integrated chronograph also incorporates a double-clutch system and flyback functionality, allowing an active timing sequence to be reset and restarted immediately. This architecture makes the movement particularly appropriate for the Big Bang Unico Titanium Blue, since functional components of the calibre form a visible part of the watch’s design rather than remaining concealed beneath a conventional dial.
Functions & Complications
The Hublot Big Bang Unico Titanium Blue provides central hours and minutes together with running small seconds at 9 o’clock. Its principal complication is an integrated flyback chronograph, using a central chronograph seconds hand and a 60-minute counter at 3 o’clock. The flyback mechanism allows an active timing operation to be reset and immediately restarted without first stopping the chronograph.
A date display is also integrated into the dial around the 3 o’clock counter. The chronograph is controlled through a column-wheel mechanism visible from the front of the watch, making its operation part of the skeleton display. Together, the date, flyback timing capability and dial-side mechanical architecture give the model substantially more functionality than a conventional time-only skeleton watch.
Performance
At 44 mm wide, 14.5 mm thick and approximately 52 mm lug-to-lug, the Hublot Big Bang Unico Titanium Blue is unmistakably a large contemporary sports watch. Its dimensions create considerable wrist presence, but Grade 5 titanium reduces the perceived weight compared with a similarly proportioned stainless-steel chronograph. The rubber strap and integrated case attachment also help keep the watch stable on the wrist.
Legibility is relatively strong for a skeleton chronograph because the applied numerals, hour markers and broad hands remain visually separated from the exposed movement underneath. Luminous material on the hands and indices improves visibility in reduced light. The approximately 72-hour power reserve means the watch can remain off the wrist for close to 3 days without immediately requiring rewinding, while 100-meter water resistance adds practical versatility. The One-Click system also makes changing compatible straps particularly straightforward, allowing the wearer to alter the configuration without conventional strap-changing tools.
Technical Data
Brand: Hublot Watches;
Model: Hublot Big Bang Unico Titanium Blue (Ref. 421.NX.5170.RX);
Year: 2021;
Case Material: Grade 5 Titanium with Composite Resin Inserts;
Case Diameter: 44 mm;
Case Thickness: 14.5 mm;
Lug Width: Proprietary One-Click Quick-Release System;
Lug-to-Lug: 52 mm;
Crystal: Sapphire Crystal with Anti-Reflective Treatment;
Water Resistance: 100 m / 330 ft (10 ATM);
Power Reserve: 72 Hours;
Movement: Automatic Mechanical Watches – Hublot Manufacture HUB1280 UNICO with Silicon Escapement (Swiss Movement);
Functions: Hours, Minutes, Small Seconds, Automatic Winding;
Complications: Flyback Chronograph, Central Chronograph Seconds, 60-Minute Counter, Date Display;
Bracelet / Strap: Blue Structured Rubber Strap with Proprietary One-Click Quick-Release System and Titanium Deployant Buckle;
Type: Calendar Watches, Chronograph Watches, Collectible Watches, Luxury Watches, Mythology & Cosmos Watches, Skeleton Watches, Sports Watches;
Sex: Men’s Watches;
Nationality: Swiss Watches.
Retail Price (Launch): €22,300 / $22,800.
The Hublot Big Bang Unico Titanium Blue represents Hublot’s modern approach to combining materials engineering with visible mechanical construction. Titanium, composite elements, rubber and an exposed manufacture calibre reflect the brand’s established “Art of Fusion” philosophy, while the dial-side column wheel gives the skeleton architecture a clear technical purpose.
The HUB1280 UNICO also places the model firmly within Hublot’s manufacture chronograph era, rather than relying primarily on external movement architecture. With its 44 mm titanium case, flyback chronograph, 72-hour power reserve and distinctive open dial, this model is particularly suited to collectors looking for a large contemporary Swiss sports watch in which the movement itself forms a central part of the design.
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