SPB257 slug_ASTRONTI12 features a diamond bezel for

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

this elegant watch also offers a date calendar

the most recognizable color in dark conditions

Based on Seiko's first sports watch

in a new olive-toned green inspired by the deep color of the forest

SPB257 slug_ASTRONTI12 features a diamond bezel 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