MOVEMENT: Japanese OS20 Quartz Chrono Movement
CASE DIAMETER: 43.5mm
THICKNESS: 13.5mm 
DIAL COLOR: Black Dial with Black subdials and Silver Numeral Markers
CASE MATERIAL:  Solid Stainless Steel 316L 
BRACELET: Rubber Strap with Insignia Buckle
FRONT GLASS: Sapphire Crystal
BACK GLASS: Solid Case Back with detailed engraving 
HACK MOVEMENT: Yes 
CLASP TYPE: Tang buckle

OTHER REMARKS:

Water Resistant 
Fully functional chronograph
Running seconds subdial at 6:00
Minute counter at 12:00 subdial
Pusher at 2:00 starts/stops chronograph
Pusher at 4:00 resets chronograph

*Please read Watch Q & A before purchase*