Wrist watch Sputnik Gruman Super Compressor Material of case : Stainless steel Case diameter : 44 mm x 55 mm Crown : screw-down (additional crown for controlling the inner bezel) Type of movement: Automatic Bezel : PVD coating, engraved ceramic insert ,luminous scale,unidirectional turning Dial : Black.Dial with SuperLumiNova, engraving that precisely imitates the casing of a space satellite Strap : genuine leather strap.Lug width: 22 mm. Glass: Sapphire crystal Waterproof: 20 ATM Functions : date