Zenith Chronomaster Open XXT Black Dial Stainless Steel Automatic 0312604021.21M Q3CQPL Stainless steel case with a stainless steel bracelet. Fixed bezel. Black dial with silver-tone hands and index hour markers, minute markers around the outer rim hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hand and markers. Chronograph - sub-dials displaying: 30-minute counter at the 3 o'clock position, power reserve indicator at the 6 o'clock position, opened dial at 10 o'clock showing the heart of el primero movement, small seconds hand at 9 o'clock. Automatic movement. El primero 4021 engine. Scratch resistant sapphire crystal. Stainless steel crown. Transparent sapphire crystal case back. Case diameter: 40mm. Case thickness: 14mm. Round case shape. Deployment buckle clasp. Water resistant at 30 meters / 100 feet. Functions: hours, minutes, seconds, chronograph, power reserve.