42 mm steel case with anti-magnetic protection, black anodised aluminium bezel ring, domed scratch-resistant sapphire crystal with anti-reflective treatment inside, white lacquered step dial with applied OMEGA logo and indexes, Omega 3861 manual-winding chronometer movement, approximately 50 hours of power reserve, integrated black rubber strap with a lunar surface pattern in positive relief on its underside. Water resistant to 50 metres (167 feet).