Citizen Watch Eco Drive AW1768 80X Green Date Dial Silver Steel Strap ng h Nam Tissot Carson Premium Chronograph White Dial Silver Steel Tissot PRC 200 Chronograph NBA Special Edition T055.217.11.017.00 ( T0 GUNNIR Launches Arc A750 Asian Games Special Edition GPUs. Band Colour Silver Band Material Stainless Steel Brand Tissot Calendar Type Date Case Diameter 42 Millimeters Case Material Stainless Steel, Alloy Steel Collection PRC 200 Dial Colour Black Crystal Material sapphire Display Type Analog Case Shape Round Model Number Tissot T055. 417. 11. 057. 01 Part Number Tissot T0554171105701 Special Features Arabic Numerals, Water Resistant, Chronograph, Glow In The Dark Warranty Type Manufacturer Movement Quartz Water Resistance Depth 200 Meters Case material: stainless steel Stainless steel 316L (Stainless Steel) is a very durable material that theoretically can not be destroyed. It is hard (non bendable and non crackable), color stable, antiallergic (does not react with body fluids and therefore no metal components are not released into the skin and flesh) and has anticorrosive surface (the surface is resistant to oxidation and corrosion. Moreover, it is also resistant to fresh and salt water). Movement: battery The watch is powered by a battery. Bracelet material: stainless steel Stainless steel 316L (Stainless Steel) is a very durable material that theoretically can not be destroyed. It is hard (non bendable and non crackable), color stable, antiallergic (does not react with body fluids and therefore no metal components are not released into the skin and flesh) and has anticorrosive surface (the surface is resistant to oxidation and corrosion. Moreover, it is also resistant to fresh and salt water). Date The watch displays the current date. Limited edition Limited Edition is a special production lot of watches of limited quantity distributed all over the world. Each piece is unique, usually by having an embossed numerical designation serial number. Most are also available with a special limited packaging. Stopwatch Stopwatch enables to measure time intervals. Water resistance: 200M 20ATM Watches marked with water tightness 200M 20ATM are designed for swimming, snorkeling, and for diving with breathing apparatus. 200M 20ATM indicates the degree of water resistance standardized by ISO 6425. ISO tests include temperature changes, depth, pressure (water and air) for different times under rest and during manipulation with the operative part of the watch. The dive models, subsequently performs the test of resistance to salt water and the ability to cope with the watch positive pressure (decompression simulation). Crystal: sapphire Sapphire glass in the watch was made in a laboratory by melting aluminium oxide (Al2O3) in the presence of hydrogen and oxygen at 2000 ?? C. After crystallisation into the corundum 'pear', it's cut and further processed into the desired shape and size. Sapphire glass is the hardest glass used in watches. It would be second behind diamond on the scale of mineral hardness, so it can only scratched by diamond. Its only disadvantage is its fragility.