Brand: Watchdives Model: WD007-39mm Movement: Japan NH35/NH38 automatic movement, 41 hours of energy storage. Case material: Grade 2 titanium + anti-fingerprint coating + hardened coating Case back: Grade 2 titanium Helium escape valve: Yes Bezel: 120 Clicks unidirect rotational bezel Bezel insert: vintage black: aluminum bezel insert Enamel Black: matte ceramic bezel insert Watch mirror: domed sapphire crystal with clear AR coating. Luminous: Swiss BGW9 blue super luminous Crown: Screw- genuine helium escape valve crown Case back: Screwback Case Watch Dimension Dial size: 28.5mm Bezel diameter: 39 mm Lug to lug: 46 mm (lug to lug) Case thickness: 13.5mm (including domed glass) Between Lugs: 18mm Style: automatic watch, dive watch, luxury watch Package: watch, box, warranty card, user manual.