CVSTOS METROPOLITAN CHRONO SAPPHIRE / BLUE DIAL Cvstos Metropolitan Chrono Sapphire / Blue Dial,  42 mm,  Cvstos CVS758, Self-winding mechanical, Skeletonized,  with function: Chronograph, Small Seconds. Reference: (42mm) F00112.4283001 30 Meters / 3 ATM or 50 Meters / 5 ATM CASE Metropolitan, Tonneau-shaped 51 x 42 mm MATERIAL Sapphire, Titanium Grade 5 COLOR Sapphire CRYSTAL Sapphire with none-reflective coating on both sides CASEBACK Open with sapphire crystal CROWN Screw-down, polished Grade 5 Titanium DIAL COLOR Blue INDEXES Diamond Markers HANDS Pierced, chromed and Super-Luminova treated MOVEMENT Cvstos CVS758, Self-winding mechanical, Skeletonized FUNCTIONS Chronograph, Small Seconds POWER-RESERVE 42 hours FREQUENCY 28,800 vibrations/hour NUMBER