The Wristwatch Field Guide

Seiko Prospex Shogun Titanium (SPB191)

The Seiko Prospex Shogun Titanium (SPB191) is a current-production diver watch with a grey titanium (grade undisclosed) case, finished with super-hard coating. It measures 43.5 mm across, 13.3 mm thick, 99 g, and is water resistant to 200 m. Inside is the Seiko 6R35 automatic movement, with 70 h power reserve. Complications: Date. Priced from $1,200 (MSRP). Brand origin: Japan.

Titanium and ceramic diver watchesTitaniumDiversUnder $5,000
Reference
–
Type
Diver
Price
$1,200 · MSRP
Case diameter
43.5 mm
Thickness
13.3 mm
Lug-to-lug
–
Water resistance
200 m
Weight
99 g (head only)
Origin
Japan
Movement
Automatic
Caliber
Seiko 6R35
Power reserve
70 h
Complications
Date
Material
Titanium
Grade / type
Titanium (grade undisclosed)
Colour
Grey
Hardness
–
Construction
–
Surface treatment
Super-hard coating
Caseback
–
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Titanium bracelet
Matching bracelet
Standard
Crystal
Sapphire, AR coated
Display back
No
Dial
White (SPB191); black (SPB189)
Lume
LumiBrite
Availability
Offered
Status
Current
High confidence Verified Jul 2026 Source: Monochrome Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the Seiko Prospex Shogun Titanium (SPB191)

CertinaDS 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 price
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 price
AndersmannClassic 300M (Titanium DLC)$1,28044.0 mm12.4 mm thick117 gDiversame category · same style · shared complications · similar price
SynchronTi300M Poseidon$1,29041.0 mm11.9 mm thick50 gDiversame category · same style · shared complications · similar price

More titanium and ceramic watches from Seiko

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

Frequently asked questions

What is the case material of the Seiko Prospex Shogun Titanium (SPB191)?

The Seiko Prospex Shogun Titanium (SPB191) has a grey 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.

All titanium and ceramic Seiko watches · Titanium and ceramic diver watches · All 1040 watches

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