Seiko Prospex Diver's GMT SPB383J1

Specifications:

Model No. SPB383J1
Movement Caliber Number 6R54
Movement Type Automatic with manual winding
Precision+25 to -15 seconds per day
Power reserve Approx. 72 hours(3 days)
Jewels 24

Functions
24-hour hand (dual time display function)
Stop second hand function

Case/Band
Case Material Stainless steel
(Bezel: Stainless steel with ceramic display)

Case Size
Thickness: 12.9mm
Diameter: 42.0mm
Lug-to-lug: 48.6mm
Sapphire crystal
Crystal Coating Anti-reflective coating on inner surface
LumiBrite on hands, index(es) and bezel
Clasp Three-fold clasp with secure lock , push button release with extender
Distance between lugs 20mm

Other Details
Water Resistance 200m / 660ft diver's
Magnetic Resistance 4,800 A/m
Weight 176.0

Features
Unidirectional rotating bezel
Screw-down crown
Three-fold clasp with secure lock
Screw case back