ExteriorCase: Bright titaniumCase back: Bright titanium and sapphire glassCase back specifications: See-through screw backGlass material: Box-shaped sapphireCoating: Anti-reflective coating on the insideCase size: Width 37.0mm, Length 44.3mm, Thickness 11.4mmBand width: 20mmClasp: One-push three-fold with micro-adjustment mechanismMovementMovement: 9RB2 InstructionsDrive method: Spring drive, automatic winding (with manual winding)Power reserve: Approximately 72 hours at maximum winding (about 3 days)Accuracy: ±20 seconds per year (equivalent to ±3 seconds per month)FunctionsWater resistance: Enhanced water resistance for daily use (10 ATM)Anti-magnetic: YesOthers:Screw lock crownMetal allergy resistantNumber of jewels: 34Power reserve display function