Authentic Zenith Chronomaster Sport men's watch. Model number is 183101360021R951 or 18.3101.3600/21.R951. Features an automatic chronograph movement, a black lacquered dial with luminous rose gold tone hands and stick hour markers plus minute markers around the outer rim. Includes three sub-dials displaying date, small seconds, 60-second, and 60-minute functions. Case is made of brushed and polished 18K rose gold with a fixed bezel featuring 1/10th second markers. The strap is also brushed and polished 18K rose gold, secured by a stainless steel folding clasp. Round case size is approximately 41mm in diameter. Water resistant to 100 meters (330 feet). Includes original box, papers, and a 2-year WatchMaxx warranty.