Seiko Prospex Mare Ref. SPB381J1

Seiko Prospex

Specifications

Movement

Caliber: 6R54

Movement type: Automatic with manual winding capability

Accuracy: +25 to -15 seconds per day

Power reserve: Approx. 72 hours (3 days)

Number of jewels: 24

Functions:

24-hour hand (dual time display function)

Second hand stop function

Case / Bracelet

Case material: Stainless steel (bezel: stainless steel with ceramic display)

Case size:

Thickness: 12.9 mm

Diameter: 42.0 mm

Lug-to-lug: 48.6 mm

Glass: Sapphire crystal

Glass coating: Anti-reflective coating on the inner surface

LumiBrite: Applied on hands, hour markers, and bezel

Clasp

Type: Triple folding clasp with safety lock

Mechanism: Push-button release with extender

Distance between lugs: 20 mm

Other Details

Water resistance: 200 meters / 660 feet (professional diving)

Magnetic resistance: 4,800 A/m

Weight: 176.0 g

Features

Unidirectional rotating bezel

Screw-down crown

Triple folding clasp with safety lock

Screw-down case back