SPB315 slug_MEssential3 and a tri-fold push button

and a tri-fold push button release clasp

this rugged and stylish timepiece also includes a screwdown crown and caseback

In stainless steel with black hard coating

this exceptionally durable timepiece is crafted of stainless steel with super-hard coating

The blue dial features day/date calendar

SPB315 slug_MEssential3 and a tri-fold push buttonProspex Automatic Diver's Watch. 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. With the thinnest case to date of any Seiko automatic diver's watch,