Hublot Spirit of Big Bang Titanium Skeleton Dial Leather Strap 601.CI.0173.LR.

Hublot Spirit of Big Bang 601.CI

An aggressive and structurally complex statement of haute horlogerie engineering, this contemporary Hublot Spirit of Big Bang, Reference 601.CI.0173.LR, features a dramatic barrel-shaped tonneau architecture. Moving away from standard titanium configurations, its commanding 45mm case is sculpted entirely from microblasted black ceramic—Hublot's signature "Black Magic" design code. The fixed black ceramic bezel is punctuated by six H-shaped black PVD titanium screws, seamlessly framing a completely open-worked skeletonized sapphire crystal dial that puts the intricate mechanics underneath on full display. Powered by the high-beat caliber HUB4700 automatic self-winding chronograph movement, which operates at a rapid 5Hz frequency to achieve flawless precision and a 50-hour power reserve, this bold sports watch is paired with a high-performance black alligator leather strap fused with a protective internal rubber lining.