Seiko Alpinist Prospex automatic watch black SPB243J1 steel bracelet. Watch with steel case with a diameter of 38 mm and a thickness of 12.9 mm. Stainless steel bezel with polished and satin finish. Black dial with date window, curved sapphire crystal and anti-reflective coating on the inner surface. Lumibrite on indexes and hands. Screw-down and transparent caseback. Screw-down crown. Automatic movement with manual winding capacity from +25 to -15 seconds per day with 24 jewels and stop second hand function. Caliber 6R35. Steel bracelet, three fold closure with release button. 20 bar water resistance, delivered with original box and official guarantee. bf22