Hublot presents the new Big Bang Sang Bleu II “Full Diamond Star” tattoo-inspired chronograph, reference RD4, created in collaboration with the renowned tattoo studio Sang Bleu.
This model continues the signature geometric design language of the Sang Bleu II series, incorporating hexagonal, diamond, and multi-layered structural elements. The design uses refined line architecture to create a strong three-dimensional visual effect, delivering a highly distinctive sculptural aesthetic.
The watch features a 45mm case with geometric elements integrated throughout the structure. Graphic components are cut and engraved into the hexagonal bezel, secured by six H-shaped titanium screws. The lugs are sharply angled with a bold and architectural profile, emphasizing the watch’s technical and artistic identity.
The dial is highlighted by diamond-shaped hour and minute hands, along with two hexagonal sub-dials. As time passes, the interaction of these geometric elements creates a constantly shifting visual pattern, producing a dynamic and artistic time display.
It is fitted with a black rubber strap that enhances comfort while reinforcing the watch’s modern geometric aesthetic. The folding clasp follows a standard luxury sports watch design for secure and convenient wearing.
The movement is based on a 7750 automatic chronograph architecture, combined with a titanium inner plate, satin-finished skeleton hands, and a multi-layer anti-reflective sapphire crystal. The crystal offers high transparency and strong scratch resistance for long-term durability. The imported fluororubber strap further improves wearing comfort and flexibility.
This Sang Bleu II edition combines high-end horology with contemporary geometric art design, delivering a visually striking and mechanically expressive luxury chronograph with strong architectural identity.




