SPB257 slug_ASTRONTI12 features both enhanced water-resistance for

features both enhanced water-resistance for marine adventures and an elegance suited for finer occasions

features a diamond bezel for a touch of luxury and a shimmering dark blue mother-of-pearl dial with silver applied indices

Based on Seiko's first sports watch

and upgraded sapphire crystal for superior scratch resistance

SPB257 slug_ASTRONTI12 features both enhanced water-resistance forProspex Black Series Limited Edition. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with re creations and re interpretations of landmark achievements. From the dramatic Black Series, this distinctive Limited