Authentic Tissot Seastar 1000 Chronograph model t120.417.17.051.03, also known by reference number T1204171705103. Features a stainless steel case with black PVD coating, a round shape measuring 45.50mm in diameter and 12.8mm thick. Equipped with a solid case back and is water resistant up to 300 meters (990 feet). The watch includes three sub-dials displaying elapsed time: one for tenths of seconds, one for minutes (up to 60), and another showing hours/minutes elapsed or potentially other functions like chronograph running time. Powered by a battery-operated quartz movement with date display positioned between the fourth and fifth hour markers on the black dial. Includes silver-tone hands and dot/index hour markers along with minute markers around the outer rim, sapphire crystal for scratch resistance, and is secured with a blue and black textile strap featuring a tang clasp.