The Titanium Field Guide

Seiko Prospex "Cave Diver" Shogun Titanium (SPB357)

The Seiko Prospex "Cave Diver" Shogun Titanium (SPB357) is a current-production diver watch with a Titanium (super-hard coating) case, finished with super-hard coating. It is priced above the $1,300 median for the category. It ships on a matching titanium bracelet rather than a strap.

Titanium diver watchesUnder $3,000On a titanium bracelet
Price
$1,500
Titanium
Titanium (super-hard coating)
Water resistance
200 m
Type
Diver
Case diameter
43.0 mm
Origin
Japan
Movement
Automatic
Caliber
6R35
Power reserve
70 h
Complications
Date
Case shape
Round
Case colour
Natural / grey
Finish technology
Surface hardening
Surface treatment
Super-hard coating
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Titanium bracelet
Titanium bracelet
Standard
Crystal
Sapphire
Display back
No
Dial
Blue
Dial colours
Blue
Lume
LumiBrite
Availability
Offered
Status
Current
Not published
Reference, Thickness, Lug-to-lug, Weight Help verify
Medium confidence Verified Jul 2026 Source: Seiko Luxe / Exquisite Timepieces Maker / listing ↗
Facts are free to cite with a link.
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Frequently asked questions

What grade of titanium is the Seiko Prospex "Cave Diver" Shogun Titanium (SPB357)?

The Seiko Prospex "Cave Diver" Shogun Titanium (SPB357) has a Titanium (super-hard coating) case with a titanium caseback. It is recorded at medium confidence pending a maker-stated grade.

What size is the Seiko Prospex "Cave Diver" Shogun Titanium (SPB357)?

It is 43.0 mm in diameter, and water resistant to 200 m.

How much does the Seiko Prospex "Cave Diver" Shogun Titanium (SPB357) cost, and is it available?

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

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