Pure technology, the LACO Chronograph leaves nothing to be desired. Day and date display, minute and hour counters, central second hand counter, and even a running sub-second dial.Naturally this watch features typical LACO refinements such as a domed, anti-reflective sapphire crystal and a 5 ATM water resistance.In the dark, the dial glows the numbers are black printed. A sapphire crystal on the back of the watch provides a view of its automatic movement.When fully wound, the watch has a power reserve of 40 hours. Movement:Automatic chronograph Laco 50basic movement ETA 7750Case:Stainless steel case, domed sapphire crystal, sapphire display backDial:Face with Superluminova C3Hands:blackStrap:Black calf leather strap with white stitchingdiameter:44,0 mmheight:16,0 mmlug width:22,0 mmlug to lug:50,0 mmwaterproof:up to 5 ATMweight:128,5 g (incl. strap)Arm circumference:16 - 21 cmMade in Germany