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HBB001K1
HBB001K1
New Limited Men's

HBB001

Prospex
Sea
June 2026Release
Seiko 145th Anniversary Limited Edition
Limited edition of 9,999 pieces

In celebration of Seiko’s 145th anniversary,
Seiko Prospex introduces a limited-edition model with blue accents inspired by “Seiko Blue.”

In the second series of commemorative limited-edition watches celebrating Seiko’s 145th anniversary, a blue accent inspired by “Seiko Blue” is used. Established in the 1960s and refined over time, Seiko Blue continues to embody the Seiko brand identity.

Inspired by “Seiko Blue,” a signature color established in the 1960s and perfected over the decades, blue is adopted as an accent color for the bezel and seconds hand.
The combination of the two-tone bezel and a silver white dial creates a fresh and sophisticated impression on the wrist.

This model inherits a case design composed of straight, blade-like surfaces, while achieving a sharper and more compact form. With chamfering on the center links, the high-quality, solid bracelet delivers a refined finish that complements the case’s linear design.

Specifications

Movement

Caliber Number
4R35
Movement Type
Automatic with manual winding
Power reserve
Approx. 41 hours
Jewels
23
Functions
  • Stop second hand function
  • Date display

Case/Band

Case Material
Stainless steel
Case Size
Thickness:12.3mm
Diameter:41.7mm
Lug-to-lug:49.5mm
Crystal
Hardlex
LumiBrite
LumiBrite on hands, index(es) and bezel
Clasp
Three-fold clasp with secure lock , push button release with extender
Distance between lugs
20

Other Details

Water Resistance
200m / 660ft diver's
Magnetic Resistance
4,800 A/m
Weight
170.0
Features
  • LIMITED EDITION on the case back
  • Unidirectional rotating bezel
  • Screw-down crown
  • Screw case back