Spirit Of Big Bang Magic Sapphire


Polished Sapphire Crystal – 42mm

Transparency, radiance and robustness in unique shades

Detailed features & specifications



The HUB4700 caliber is the successor to the famous El Primero caliber – the first chronograph with an integrated style automatic winding (1969), which was also the first mechanical chronograph equipped with a 5 Hz frequency (36’000 alt/h) allowing an accuracy of 1/10th of a second. In a perfect fusion between tradition and innovation, this entirely skeletonized movement is now equipped with silicon regulating element ensuring avant-garde performances, precision and reliability.


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 – 642.JX.0170.RX

Size – 42 mm

Case – Polished Sapphire Crystal

Bezel – Polished Sapphire Crystal with 6 H-shaped Titanium Screws

Water Resistance – 50m or 5 ATM

Crystal – Sapphire with Anti-reflective Treatment

Dial – Sapphire Crystal Dial

Movement – HUB4700 Self-winding Skeleton Chronograph Movement

Power Reserve – 50 Hours

Strap – Black Structured Lined Rubber Straps

Clasp – Titanium Deployant Buckle Clasp

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