MOVEMENT: Japanese OS 20 Quartz Chronograph Movement
CASE DIAMETER: 48.7mm 
THICKNESS: 17mm 
DIAL COLOR: Black Dial, Black Subdials, Stick Markers
CASE MATERIAL: Solid Stainless Steel 316L
BRACELET: Leather Strap with Insignia Single Fold Deployant Clasp
FRONT GLASS: Sapphire Crystal
BACK GLASS: Close case back with Detailed Engraving
BEZEL: Knurled Finish Bezel
HACK MOVEMENT: Yes  
DATE INDICATOR: At 4:30 position  

OTHER REMARKS:

Water Resistant 
FULLY FUNCTIONAL Chronograph
Pusher button at 2:00 starts/stops chronograph
Pusher button at 4:00 reset chronograph