Meet Hublot Spirit of Big Bang (ref. 601.NX.0173.LR.0904), a distinctive model that balances proportion, precision, and presence. On the wrist, the case feels purposeful: measuring 45 mm in diameter, defined by a tonneau silhouette, paired with a gem-set bezel. The caseback is open, and the crystal is sapphire, delivering water resistance to 10000 meters. Visually, the face is where character emerges: a skeleton tone, framed by stick / dot hour markers, and stick hands. Mechanically, the watch prioritizes accuracy: the HUB4700 caliber. The silhouette offers presence without excess, lending confidence in a range of situations. Finishing showcases disciplined attention to detail across facets, edges, and surfaces. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.