Special 50th Anniversary edition. Stainless steel case and bracelet. Light grey dial with dark navy subdials. Luminous hands and hour markers. Self-winding mechanical movement. Min. 42 hour power reserve. Chronograph measures 1/4th second, 30 minutes, and 12 hours. Date displays between 4 and 5 o'clock positions. Bidirectional rotating bezel with slide rule. Non screw-locked crown with 2 gaskets. Cambered sapphire crystal, glareproofed both sides. Case diameter 41.80mm. Case thickness 14.60mm. Water resistant at 30 meters (100 feet).