This Omega is 44.25 mm black ceramic case, transparent back, brushed ceramic bezel with matt chromium nitride tachymeter scale, scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black dial, calibre 9300 self-winding chronograph movement with column wheel mechanism and co-axial escapement for greater precision stability and durability, approximately 60 hours of power reserve, black coated nylon fabric strap, foldover buckle. Water resistant to 50 m (167 ft).