Big Bang Unico Yellow Sapphire


Yellow Sapphire – 42mm

Transparency, radiance and robustness in unique shades

Detailed features & specifications


The Unico 2 caliber was designed to equip smaller chronographs and also open the world of Hublot to new enthusiasts. It retains the unique design of its former version with a double coupling system visible from the dial side as well as a 72-hour power reserve. But thanks to various technical optimizations, including the introduction of a new, flatter automatic winding system, it has been reduced by 1.3 mm in thickness.


In search of the perfect fusion between movement and case, Hublot engineers and chemists have researched and developed a transparent material which reveals the heart of the watch, all while being robust enough to effectively protect the mechanism. That’s how the Manufacture has become the expert of synthetic sapphire, a material from which it derives its aesthetic qualities that are unique within watchmaking – transforming each watch into a work of art.

Technical Details

Reference – 441.JY.4909.RT

Size – 42 mm

Case – Polished Yellow Sapphire Crystal

Bezel – Polished Yellow Sapphire Crystal 6 H-shaped Black-plated Titanium Screws

Water Resistance – 50m Or 5 Atm

Crystal – Sapphire With Anti-reflective Treatment

Dial – Polished And Smoked Transparent Composite Resin Skeleton Dial

Movement – Hub1280 Unico Manufacture Self-winding Chronograph Flyback Movement With Column Wheel

Power Reserve – 72 Hours

Strap – Transparent Yellow Structured Lined Straps

Clasp – Black-plated Titanium Deployant Buckle Clasp

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