Hublot Big Bang Integral Blue Ceramic Watch - 42 mm - Blue Skeleton Dial - 451.EX.5123.EX42 mm satin finished and polished blue ceramic case, satin finished and polished blue ceramic bezel with 6 h shaped titanium screws, sapphire crystal with anti reflective treatment, mat blue skeleton dial, HUB1280 UNICO manufacture self winding chronograph flyback movement, approximately 72 hours of power reserve, satin finished and polished blue ceramic bracelet, titanium deployant buckle. Water resistant to 100m (10 ATM).