SEIKO PROSPEX SEA GMT 3DAYS Automatic SPB383J1

Specifications
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
Crystal
Sapphire crystal
Crystal Coating
Anti-reflective coating on inner surface
LumiBrite
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
176.0g
Features
Unidirectional rotating bezel
Screw-down crown
Screw case back