Hublot Spirit of Big Bang Sapphire Blue 42mm 642.JX.7170.RX

The Hublot Spirit of Big Bang Sapphire Blue 642.JX.7170.RX stands as one of the boldest expressions in Hublot's celebrated Big Bang universe. Introduced as a tonneau-shaped evolution of the iconic round Big Bang, the Spirit of Big Bang line reinterprets the original architecture with a barrel case silhouette that feels both futuristic and instantly recognizable. The fully sapphire crystal case on this 42mm reference takes that vision to its logical extreme, eliminating all metal and revealing every internal component to the eye — a feat of manufacturing that requires extraordinary precision in cutting, polishing, and assembling synthetic corundum.

At 42mm, the Spirit of Big Bang occupies a versatile sweet spot within Hublot's size range, generous enough to make an unmistakable statement on the wrist yet refined enough to wear beyond the realm of sport. The tonneau shape, with its arched lugs and sculpted flanks, sits comfortably against the wrist contour and offers a wrist presence that is theatrical without being unwieldy. The case material — sapphire crystal — is second only to diamond in hardness on the Mohs scale, making this reference remarkably resistant to surface scratching in everyday wear.

The dial of the 642.JX.7170.RX features index hour markers that float against the transparent backdrop, creating a nearly skeletal aesthetic without the visual complexity of a fully skeletonized dial. The sapphire crystal bezel frames the dial with the same optically pure material as the case, ensuring that nothing interrupts the view of the movement within. A matched rubber strap completes the composition, providing both comfort and the sporty DNA that has defined the Big Bang family since its debut.

Powering the Spirit of Big Bang is a mechanical movement that is fully exposed through the sapphire case — a deliberate design choice that transforms the movement itself into the centerpiece of the watch. Hublot's in-house movements are engineered with the brand's signature fusion philosophy, blending high-horological craft with innovative materials. The visual drama of watching the bridges, rotors, and escapement work in real time through a case made entirely of sapphire crystal is, simply put, unmatched in the industry at this price tier.

For collectors seeking a conversation piece that also delivers genuine watchmaking substance, the Hublot Spirit of Big Bang 642.JX.7170.RX is a compelling acquisition. It represents the apex of Hublot's commitment to avant-garde materials and is a reference that photographs and presents on the wrist with equal magnificence. Whether you are a seasoned Hublot collector adding a showpiece to your rotation or a new buyer looking to invest in an iconic reference that will retain its identity for decades, this watch delivers.

Bizak & Co. is proud to offer this brand-new Hublot Spirit of Big Bang Sapphire Blue 642.JX.7170.RX at a competitive price with the assurance of authenticity and expert aftercare. Our team of specialist advisors is available to walk you through the details of this reference, answer any questions, and facilitate a seamless purchase experience whether you are buying in person or online. Browse our full Hublot collection at bizakandco.com or reach out directly to secure this remarkable timepiece.