Seiko SPB381J1 GMT sea diver's 200 meters watch with Green dial and unidirectional black ceramic bezel insert, Seiko 6R54 manual winding mechanical movement with 72 hours of power reserve, sapphire crystal with internal anti-reflective treatment, screw-down crown and caseback, case and bracelet with super hard coating treatment, case diameter 42 mm. and thickness 13 mm.

External components

Case: stainless steel with anti-scratch treatment, screw back

Crown: screw-down stainless steel

Bezel: Ceramic

Glass: sapphire with anti-reflective treatment

Index: lumibrite

Hands: lumibrite

Bracelet: stainless steel with anti-scratch treatment

Buckle/clasp: extendable folding clasp with safety button

Water resistance: 200 m diver's

Magnetic resistance: 4,800 A/m

Thickness: 12.9 mm

Diameter: 42.0 mm

Automatic movement

Caliber: 6R54

Functions: 3 hands, Date, Manual winding possible, GMT

Power reserve: 72 hours at full charge