SEIKO PROSPEX Great Blue Hole Special Edition  Diver's 200m SPB083J1

CALIBER NO. 6R15
FEATURES: Power reserve: 50 hours
21,600 vibrations per hour
23 jewels

CASE: Stainless steel case with super-hard coating
BAND: Stainless steel bracelet
Three fold clasp with secure lock, push button release with extender
Glass Material:  Curved sapphire crystal
Glass Coating:  Anti-reflective coating
WATER RESISTANCE     200m diver's
CASE DIAMETER  44mm
Case Thickness 13.05mm
Length: 50.96?
Weight 189g
Screw case back
Screw-down crown

http://www.seikokorea.com/product/spb083j/