The Titanium Field Guide

Seiko Prospex "Cave Diver" Shogun Titanium (SPB349)

The Seiko Prospex "Cave Diver" Shogun Titanium (SPB349) is a current-production diver watch with a titanium (super-hard coating) case, finished with super-hard coating. It is priced above the $1,299 median for the category. It ships on a matching titanium bracelet rather than a strap.

All Seiko watchesWatch diver watchesUnder $3,000On a titanium bracelet
Price
$1,500
Material
Titanium
Grade / type
Titanium (super-hard coating)
Water resistance
200 m
Type
Diver
Case diameter
43.5 mm
Origin
Japan
Movement
Automatic
Caliber
6R35
Power reserve
70 h
Complications
Date
Colour
Grey
Surface treatment
Super-hard coating
Finish technology
Surface hardening
Caseback
Titanium
Nickel-free
Unconfirmed (clasp or buckle material not confirmed)
Bracelet / strap
Titanium bracelet
Matching bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Green (textured)
Dial colours
Green
Lume
LumiBrite
Availability
Offered
Status
Current
Not published
Reference, Thickness, Lug-to-lug, Weight, Hardness, Construction
Medium confidence Verified Jul 2026 Source: Seiko Luxe / AZ Fine Time
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Seiko Prospex "Cave Diver" Shogun Titanium (SPB349)?

The Seiko Prospex "Cave Diver" Shogun Titanium (SPB349) has a titanium (super-hard coating) case with a titanium caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Seiko Prospex "Cave Diver" Shogun Titanium (SPB349)?

It is 43.5 mm in diameter, and water resistant to 200 m.

How much does the Seiko Prospex "Cave Diver" Shogun Titanium (SPB349) cost, and is it available?

It is current-production and lists from $1,500.

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