The Titanium Field Guide

Seiko Prospex Shogun Titanium (SPB191)

The Seiko Prospex Shogun Titanium (SPB191) is a current-production diver watch with a Titanium (grade undisclosed) case, finished with super-hard coating. At 99 g it sits around the middle for diver watches in the guide, and is priced close to the $1,300 median for the category. It ships on a matching titanium bracelet rather than a strap.

Titanium diver watchesUnder $3,000Lightest, rankedOn a titanium bracelet
Price
$1,200
Titanium
Titanium (grade undisclosed)
Weight
99 g (head only)
Water resistance
200 m
Type
Diver
Case diameter
43.5 mm
Thickness
13.3 mm
Origin
Japan
Movement
Automatic
Caliber
Seiko 6R35
Power reserve
70 h
Complications
Date
Case shape
Round
Case colour
Natural / grey
Finish technology
Surface hardening
Surface treatment
Super-hard coating
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Titanium bracelet
Titanium bracelet
Standard
Crystal
Sapphire, AR coated
Display back
No
Dial
White (SPB191); black (SPB189)
Dial colours
Black White
Lume
LumiBrite
Availability
Offered
Status
Current
Not published
Reference, Lug-to-lug, Caseback Help verify
High confidence Verified Jul 2026 Source: Monochrome Maker / listing ↗
Facts are free to cite with a link.
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Alternatives to the Seiko Prospex Shogun Titanium (SPB191)

Certina DS Action Diver 40.5mm TitaniumCertinaDS Action Diver 40.5mm Titanium$1,06040.5 mm14.1 mm thick124 gDiversame category · same style · shared complications · similar priceVenezianico Nereide TitanioVenezianicoNereide Titanio$1,13042.0 mm12.5 mm thick66 gDiversame category · same style · shared complications · similar priceCitizen Promaster Fujitsubo Platinum DLC (Super Titanium)CitizenPromaster Fujitsubo Platinum DLC (Super Titanium)$1,19541.0 mm119 gDiversame category · same style · shared complications · similar price
HelsonShark Diver 45 Military Titanium$1,19545.0 mmDiversame category · same style · shared complications · similar priceAndersmann Classic 300M (Titanium DLC)AndersmannClassic 300M (Titanium DLC)$1,28044.0 mm12.4 mm thick117 gDiversame category · same style · shared complications · similar priceSynchron Ti300M PoseidonSynchronTi300M Poseidon$1,29041.0 mm11.9 mm thick50 gDiversame category · same style · shared complications · similar price

More titanium watches from Seiko

SeikoProspex "Cave Diver" Shogun Titanium (SPB349)$1,50043.5 mmDiverSeiko Prospex SeikoProspex "Cave Diver" Shogun Titanium (SPB351)$1,50043.5 mmDiver
SeikoProspex "Cave Diver" Shogun Titanium (SPB357)$1,50043.0 mmDiverSeiko Prospex Marinemaster Professional 600m Titanium (SBDX067)SeikoProspex Marinemaster Professional 600m Titanium (SBDX067)$4,60045.4 mmDiverSeiko Prospex LX Line Spring Drive GMT Titanium (SNR035)SeikoProspex LX Line Spring Drive GMT Titanium (SNR035)$5,25044.8 mmOtherSeiko Prospex Marinemaster Professional 600m Titanium (SLA081, 60th Anniversary)SeikoProspex Marinemaster Professional 600m Titanium (SLA081, 60th Anniversary)$4,60045.4 mm16 mm thick174 gDiver

Frequently asked questions

What grade of titanium is the Seiko Prospex Shogun Titanium (SPB191)?

The Seiko Prospex Shogun Titanium (SPB191) has a Titanium (grade undisclosed) case. This is confirmed against the maker spec.

What size is the Seiko Prospex Shogun Titanium (SPB191)?

It is 43.5 mm in diameter, 13.3 mm thick, and water resistant to 200 m.

How much does the Seiko Prospex Shogun Titanium (SPB191) weigh?

About 99 g (head).

How much does the Seiko Prospex Shogun Titanium (SPB191) cost, and is it available?

It is current-production and lists from $1,200.

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