Seiko HBC001 Prospex Sea GMT 42mm green dial watch with green bezel on stainless steel bracelet
Angled close-up of Seiko HBC001 Prospex Sea GMT 42mm green bezel watch on stainless steel bracelet
Seiko HBC001 Prospex Sea GMT 42mm green bezel watch close-up on stainless steel bracelet
Close up of brushed stainless steel Seiko watch bracelet with engraved clasp
Seiko

HBC001 Prospex Sea GMT 42mm - Green on Bracelet

$1,800
★★★★★ (1) review

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Seiko official 3 year warranty included

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Not the right fit? Returns are simple.

Our Return Policy

Returns & Exchanges

We want you to love your watch. If it's not the right fit, our client services team is here to make returns and exchanges simple.

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We'll provide a prepaid return label for eligible returns.

How to Start a Return

Log into your account or contact our client services team at orders@teddybaldassarre.com. Returns must be started within 5 business days of receiving your order.

Return Conditions

To be eligible, your watch must be unworn, unaltered, and in its original condition with all packaging, tags, stickers, and paperwork included. Straps and bracelets must not be removed, adjusted, or sized, and the Teddy Baldassarre security tag must still be attached.

Not Eligible for Return

Special orders, watches with sized or altered bracelets, and books are final sale.

Please see our Refund Policy for full details, including restocking fees and refund timelines.
Seiko
$1,800

HBC001 Prospex Sea GMT 42mm - Green on Bracelet

The Details

  • 42 mm

    Case Size

  • 13.3 mm

    Case Height

  • 48.6 mm

    Lug to Lug

  • 300m

    Water Resistance

Overview

Case Height

13.3 mm

Case Size

42 mm

Collection

Prospex

Style

Diver, GMT

Lug to Lug

48.6 mm

Lug Width

20 mm

Movement

Automatic

Reference

HBC001

Release Date

2026-04-20

Water Resistance

300m

Case

Bezel

Unidirectional roatating, stainless steel with green ceramic display and lume

Caseback

Screw

Case Material

Stainless steel

Clasp / Buckle

Three-fold clasp with secure lock & push button release, solid & slide adjuster. The new clasp can be adjusted in six steps, each measuring about 2.5mm, for a total range of approximately 15mm. It allows for a comfortable fit at all times, accommodating changes in wrist size during diving and daily life.

Crown

Screw-down

Crystal

Sapphire crystal with anti-reflective coating on inner surface

Dial Color

Green

Dial Features

Applied indexes and date window at 4:30

Lume

LumiBrite on hands, indexes and bezel

Strap / Bracelet Material

Stainelss steel bracelet

Movement

Accuracy

'+25 to -15 secs/day

Caliber

6R54

Features

Magnetic Resistance: 4,800 A/m

Functions

24-hour hand (dual time display function), stop second hand function

Jewels

24 Jewels

Movement

Automatic with manual winding

Power Reserve

72 Hours

Complication

24-Hour Time, Date

Why Buy From Teddy?

All watches ship free within the U.S.

Manufacturer's warranty on all orders

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About Seiko

One Step Ahead

Seiko was founded in 1881 in Tokyo, Japan and has grown to become one of the largest watch companies in the world. Today, Seiko’s diverse collection presents impressive value backed by some of the most iconic designs in watch history. Perhaps best known for its sporty Prospex collection, Seiko’s legend also stems from the attainable Seiko 5 Sports collection as well as the refined Presage range of well-finished dress watches.

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