The Hublot Big Bang Unico Blue Sapphire has a manufacture self-winding chronograph flyback movement with column wheel contained within a 45mm polished blue sapphire crystal case. The polished and smoked transparent composite resin skeleton dial has satin-finish hands and appliques with blue luminescence. It is covered by scratch-resistant sapphire crystal with an anti-reflective treatment. The blue transparent structured lined strap has a titanium deployant buckle. Water resistant to 50 meters. Limited edition of 250 pieces.