SPB534

Prospex
Sea

Nov 2025 Release

1968 Heritage Diver's GMT Watch Limited Edition

Limited edition of 500 pieces

Seiko Boutique Limited Edition

A special design in black and gold

Based on the 1968 Heritage Diver’s GMT watch and available exclusively at select Seiko Boutiques. This unique watch features a sleek black ceramic bezelaccented with shimmering gold tones.

Endowed with updated functionality

The 1968 Heritage Diver’s GMT Watch is powered by the Caliber 6R54, which features a GMT function that allows it to display the time in two different time zones. The watch’s specifications have been enhanced to offer 300-meter water resistance.

A new clasp designed for comfort and operability

The new clasp can be adjusted in six steps, each measuring about 2.5mm, for a total range of approximately 15mm. This marks the first time that this clasp has been adopted in a non-limited-edition model. It allows for a comfortable fit at all times, accommodating changes in wrist size during diving and daily life.

Specifications

Movement

Caliber Number

6R54

Movement Type

Automatic with manual winding

Precision

+25 to -15 seconds per day

Power reserve

Approx. 72 hours(3 days)

Jewels

Functions

24-hour hand (dual time display function)
Stop second hand function

Case/Band

Case Material: Stainless steel (super hard coating)
Case Size: Thickness:13.3mm
Diameter:42.0mm
Lug-to-lug:48.6mm
Crystal: Sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface
LumiBrite: LumiBrite on hands, index(es) and bezel
Clasp: Three-fold clasp with secure lock & push button release, solid & slide adjuster
Distance between lugs: 20mm

Other Details

Water Resistance

300m / 1000ft diver's

Magnetic Resistance

4,800 A/m

Weight

188.0g

Features

LIMITED EDITION on the case back
Serial number engraved on the case back
Unidirectional rotating bezel
Screw-down crown
Three-fold clasp with secure lock
Screw case back