APEKS WATCH - RUBBER 1000MMens' Professional 1000 Metre watch Water resistant to 1000 metres. This is the ultimate dive watch. Tough 316L stainless steel one way bezel. Polyruthane strap. Screw down crown. Mineral Glass. Helium escape valve (the valve will open when the internal pressure is 4.5 Bar +/- 1.5 Bar higher than the external pressure). The valve has a protective cap for casual use. Seiko-Epson VX42E date quartz analogue movement. A very accurate timepiece.