Description
Seiko Prospex Alpinist
SPB157
Case: Stainless steel
        Diameter: 38 mm
        Thickness: 12.9 mm
Crystal:Â Curved sapphire with anti-reflective coating on inner surface
Lumibrite:Â Luminous hands and indexs
Dial: Gradated blue
Strap: Blue leather strap
Movement: Automatic 6R35
Accuracy:Â +25 to -15 seconds per day
Power reserve:  Approximately 70 hours
Water-resistant:Â Up to 20 bar, 200 meters/ 660 feet
Other specifications and features: Screw case back, screw-down crown, see-through case back, 24 jewels, date display, stop seconds hand function