Hublot Big Bang Unico Sapphire Rainbow 45mm

【Case Construction】
• Reference-based specification: 45 mm Big Bang Unico Sapphire Rainbow case, based on Reference 411.JX.4803.RT.4099; this limited model is described with polished sapphire case, white-gold rainbow gemstone bezel, HUB1242 Unico flyback chronograph movement, and transparent rubber strap.
• The transparent sapphire case gives the watch a futuristic and highly collectible appearance.
• The rainbow baguette-set bezel adds strong high-jewelry impact.
• Titanium screws, pushers, and crown details reinforce the technical Big Bang identity.

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【Dial Highlights】
• The transparent skeleton dial exposes the Unico chronograph movement.
• Rainbow bezel gemstones create a vivid frame around the open dial.
• White luminous markers and hands maintain readability.
• The overall design combines transparency, color, and mechanical complexity.

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【Crystal】
• Sapphire-style crystal and sapphire case construction create a fully transparent visual effect.
• The crystal highlights both movement depth and gemstone brilliance.
• Its clear structure gives the watch a rare architectural presence.

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【Movement】
• Powered by HUB1242 Unico self-winding flyback chronograph movement.
• Functions include chronograph timing, date, hours, minutes, and seconds.
• The flyback chronograph architecture strengthens the watch’s technical credibility.

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【Strap & Clasp】
• Transparent structured rubber strap continues the sapphire-case concept.
• The strap keeps the colorful bezel as the visual focus.
• Titanium deployant clasp provides secure and lightweight wear.