Hublot Spirit of Big Bang Black Magic 42mm 642.CI.0170.RX

【Case Construction】
• Reference-based specification: 42 mm tonneau-shaped case in microblasted black ceramic, based on Hublot Reference 642.CI.0170.RX. The reference is listed with black ceramic case, black ceramic bezel, sapphire crystal, 100 m / 10 ATM water resistance, and black rubber strap.
• The tonneau case shape gives the watch a more architectural and aggressive profile than the round Big Bang line.
• The black ceramic construction creates a stealthy, modern, and technical appearance.
• The exposed H-shaped screws preserve Hublot’s industrial design identity.

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【Dial Highlights】
• The skeleton dial exposes the chronograph movement architecture, giving the watch strong mechanical depth.
• Large Arabic numerals, baton markers, and luminous hands maintain readability despite the openworked structure.
• The black and silver color palette reinforces the Black Magic theme.
• The three-register chronograph layout adds practical sports timing functionality.

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【Crystal】
• Sapphire-style crystal provides strong clarity and scratch resistance.
• The crystal gives a clear view of the skeletonized dial, sub-dials, and movement layers.
• Its anti-reflective visual treatment supports readability from different angles.

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【Movement】
• Powered by a HUB4700-style self-winding skeleton chronograph movement, commonly associated with this reference, with approximately 50 hours of power reserve.
• Functions include hours, minutes, chronograph timing, and date display.
• The movement layout supports both sports functionality and openworked visual appeal.

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【Strap & Clasp】
• Paired with a black structured rubber strap.
• The strap matches the black ceramic case and keeps the watch sporty and comfortable.
• Deployant-style clasp provides secure daily wear.