Seiko Prospex Automatic Men's 41.70mm Watch HBB001K

Celebrating 145 years of Seiko watchmaking, the Seiko Prospex HBB001K is a limited edition diver's watch from the Sea collection — a piece built for the water and designed to stand the test of time. Available in strictly limited numbers, it marks a milestone in one of Japan's most respected watchmaking legacies.

At the heart of the HBB001K is Seiko's Calibre 4R35, an automatic movement that powers itself through the natural motion of your wrist and can also be wound by hand when needed. It delivers approximately 41 hours of power reserve, so the watch keeps running well beyond the weekend without being worn. A date display adds everyday practicality to a watch built for more than just the office.

 The 41.7mm stainless steel case is rated to 200 metres water resistance — well suited to recreational diving and water sports. A screw-down crown helps maintain that seal, while the one-way rotating bezel lets divers track elapsed time underwater with ease. LumiBrite on the hands and hour markers ensures the dial remains readable in dark or murky conditions where it matters most.

The white dial is clean and uncluttered, framed by a silver stainless steel bracelet that feels as capable as it looks. At just 12.3mm thick, the HBB001K wears comfortably on the wrist despite its robust specification — a wearable piece of Seiko history for collectors and enthusiasts alike.