Omega Seamaster Railmaster Automatic Men's Watch 220.10.40.20.06.001.  Stainless steel case with a stainless steel bracelet. Fixed stainless steel bezel. Brushed grey dial with luminous silver-tone hands and index hour markers. Arabic numerals mark the 3, 6, 9 and 12 o'clock positions. Minute markers around the outer rim.  Luminescent hands and markers. Omega calibre 8806 automatic movement with a 55-hour power reserve. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Round case shape. Case size: 40 mm. Case thickness: 12.65 mm. Band width: 20 mm. Fold over clasp with a push button release. Water resistant at 150 metres / 500 feet.