Phantom tinted sapphire is a unique feature of this men's M-Series quartz chronograph. Like it's counter-part the M74, this watch utilizes titanium carbide PVD hard coating and trademarked luminescence technology but has slightly smaller case width of 40mm. With only 100 pieces produced, the M74-S is sure to be unique and eye-catching. 22mm lug width 12mm thick 316L stainless steel case High tech Viton® gasket Precision screw down crown with double diamond sealing system Bead blasted titanium carbide PVD hard coating Special phantom tinted sapphire crystal Threaded stainless steel caseback Heavy duty quartz chronograph movement Japanese made Miyota OS20J movement 100 meters/330 ft. water resistance 2 straps included: Leather strap with matched stitching and quick release changing system 22/22 size, Custom molded anti static rubber strap 22/22 size Extra spring bars included for fitting other straps 40mm width excluding crown (approximately 1 19/32 inches) One year limited warranty Limited numbered series of 100 Free lifetime battery replacement service