The Art of Fusion in Sapphire Form

At the core of this timepiece lies Hublot’s philosophy of the Art of Fusion, brought to life through the seamless integration of cutting-edge sapphire engineering and heritage-inspired watchmaking. The tonneau-shaped case, carved entirely from sapphire crystal, reveals every facet of the watch’s construction, emphasizing both transparency and structural complexity.
The sapphire dial continues this visual openness, allowing the wearer to fully appreciate the intricacies of the skeletonised movement. Subtle blue accents on the strap and internal elements add depth and contrast, enhancing the watch’s futuristic character while maintaining a refined and cohesive aesthetic.
Every surface, from the polished bezel to the precisely finished edges, reflects Hublot’s dedication to craftsmanship, creating a timepiece that is as technically advanced as it is visually compelling.

A High-Frequency Mechanical Heart

Powering the watch is the HUB4700 self-winding skeleton chronograph movement, a modern reinterpretation of a legendary high-frequency calibre. Operating at 5 Hz, this movement enables precise measurement to one-tenth of a second, delivering both performance and reliability in a contemporary format.
Engineered with advanced materials, including a silicon regulating element, the calibre is designed to enhance long-term precision and durability. Its fully skeletonised construction ensures that every component, from the chronograph mechanism to the gear train, is visible, reinforcing the watch’s technical identity and mechanical transparency.

Exclusive by Design, Engineered for Everyday

As a highly limited edition, the Spirit of Big Bang Sapphire Blue offers a rare combination of exclusivity and innovation, appealing to collectors who value both rarity and cutting-edge design.
Despite its avant-garde construction, the watch remains highly wearable. The blue structured rubber strap provides comfort and flexibility, while the robust sapphire case and water resistance to 100 metres ensure durability in everyday conditions.
This balance between bold design and practical performance reflects Hublot’s ability to create timepieces that are as functional as they are visually distinctive.

Technical Specifications

Case

Material: Polished sapphire crystal
Diameter: 42mm
Case Shape: Tonneau
Bezel: Polished sapphire crystal
Water Resistance: 100m / 10 ATM
Crystal: Sapphire with anti-reflective treatment

Dial

Type: Sapphire crystal dial (skeletonised)

Movement

Calibre: HUB4700 automatic skeleton chronograph
Frequency: 5 Hz (36,000 vibrations/hour)
Power Reserve: Approximately 50 hours

Strap & Clasp

Strap: Blue structured lined rubber strap
Clasp: Titanium deployant buckle clasp