Released in 2023, the Big Bang Unico Sky Blue 441.EX.5120.RX was introduced as a limited edition model within Hublot’s modern ceramic chronograph line, with production restricted to only 200 pieces worldwide.
Light blue ceramic forms the case and bezel construction, combining low weight with strong scratch resistance while giving the watch its distinctive summer inspired appearance. A skeletonised dial exposes the internal structure of the HUB1280 manufacture calibre, allowing direct visibility of the chronograph architecture and column wheel system.
Flyback chronograph functionality enables the timing mechanism to reset and restart instantly through a single action, supporting rapid elapsed time measurement. Luminescent hands and hour markers improve visibility under lower lighting conditions without interrupting the open worked layout. Two interchangeable straps are included: a white and light blue lined rubber strap for sport oriented wear, alongside a white calf leather strap with velcro fastening for a more relaxed configuration.
Mechanical performance is delivered through Hublot’s self winding Unico movement, developed to combine chronograph precision with extended daily usability.
Summer inspired colour execution defines the identity of this reference, moving away from traditional monochrome chronograph aesthetics toward a brighter and more expressive design direction. The light blue ceramic construction reflects Hublot’s focus on experimental material development, where colour integration is engineered directly into the ceramic rather than applied as surface coating.
Transparency plays a central role in the visual concept. Instead of concealing the movement beneath a solid dial, the skeletonised structure turns the chronograph mechanism into part of the watch’s presentation, exposing the internal operation of the column wheel and flyback system.
Within the Hublot Big Bang collection, this edition represents Hublot’s combination of contemporary materials, visible mechanics, and limited edition exclusivity in a single sports chronograph format.
Limited production of only 200 pieces makes this reference significantly less accessible than standard Big Bang models, placing most availability within the pre owned market.
Interest in this watch comes from its unusual ceramic colour execution combined with visible chronograph mechanics and flyback functionality. The open worked dial and sky blue case create a far more distinctive visual identity compared to traditional black or titanium sports chronographs.
Pre-owned acquisition also allows closer evaluation of ceramic condition, strap wear, and movement performance after actual ownership use, which is particularly important for limited edition models where replacement availability may be more restricted.
Here at BQ Watches, we strive to provide all types of service for your luxury item. We’ve been providing services to the UK and international markets for pre-owned luxury watches for more than 30 years. When choosing us, our customers can always expect a welcoming and enjoyable watch-buying experience. We can also set up the service for you if you want to exchange or sell your watch. We’ll provide you with a fantastic offer, making the selling procedure efficient and enjoyable.
In addition, if you require it, we provide expert cleaning, repair, and appraisal services. Not to mention, we also provide the greatest sourcing services for expensive watches. Our experts will go above and beyond to get you the ideal timepiece if you have a certain watch in mind. We’ll start working for you as soon as you give us the brand, model number, and any other pertinent information.
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Verification begins with authentication of the limited edition reference, including confirmation of correct case construction, movement configuration, and production specific detailing.
The flyback chronograph system is tested through complete operational cycles to ensure accurate reset and restart functionality. Inspection also covers the skeleton dial structure, ceramic surface condition, and integrity of both supplied straps.
Market valuation is based on current transaction activity for limited edition Unico ceramic models, ensuring pricing reflects real collector demand rather than estimated catalogue positioning.
This process provides a fully authenticated and mechanically tested watch to collectors looking to buy watches, while sellers receive valuation aligned with live market conditions. Watch exchange options are also available for clients repositioning their collection.
