The 41 mm brushed and polished grade 5 titanium case is presented on a matching bracelet a transparent caseback makes it possible to see the anti magnetic omega master co axial calibre 8400 withincrystal domed scratch resistant sapphire crystal with anti reflective treatment insidecase titaniumdial bluewater resistance 30 bar 300 metres 1000 feetsize 41mmcaliber omega 8400power reserve 60 hours