The Wristwatch Field Guide

Seiko Brightz World Time Executive SAGA186 (Titanium)

Archive · used only

The Seiko Brightz World Time Executive SAGA186 (Titanium) is a discontinued other watch with a grey titanium (diamond shield hard coating) case, finished with diamond shield hard coating. It measures 43.5 mm across, 12 mm thick, 93 g, and is water resistant to 100 m. Inside is the Seiko Cal. 8B54 solar radio-controlled quartz (world time) movement. Complications: Worldtimer, Date. Brand origin: Japan. No longer offered new; listed here as an archive reference for the used market.

Titanium and ceramic other watchesTitanium
Reference
–
Type
Other
Price
– · Y237,600 at launch (JDM); secondary market only
Case diameter
43.5 mm
Thickness
12 mm
Lug-to-lug
–
Water resistance
100 m
Weight
93 g
Origin
Japan
Movement
Solar radio-controlled quartz (world time)
Caliber
Seiko Cal. 8B54
Power reserve
–
Complications
Worldtimer, Date
Material
Titanium
Grade / type
Titanium (Diamond Shield hard coating)
Colour
Grey
Hardness
–
Construction
–
Surface treatment
Diamond Shield hard coating
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Titanium bracelet
Matching bracelet
Standard
Crystal
Sapphire, super-clear coating
Display back
No
Dial
Black with diamond markers
Lume
–
Availability
No longer offered
Status
No longer in production (discontinued JDM Brightz)
Medium confidence Verified Jun 2026 Source: Jackroad (SAGA186, case chitan, ceramic bezel) / kakaku.com (SAGA186 spec) Maker / listing ↗ Suggested by u/StudioZanello
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the Seiko Brightz World Time Executive SAGA186 (Titanium)

Montblanc1858 Geosphere 42mm Titanium (strap)$6,55042.0 mm12.8 mm thickOthersame category · same style · shared complications · similar sizeCasio Oceanus Manta OCW-S7000-1ACasioOceanus Manta OCW-S7000-1A$1,30042.8 mm9.5 mm thick83 gOthersame category · same style · shared complications · similar size
KRONOSTIAtlas GMT$20941.0 mm13 mm thickOthersame category · same style · shared complications · similar sizeKRONOSTI Deep Explorer 24HKRONOSTIDeep Explorer 24H$26941.0 mm13 mm thickOthersame category · same style · shared complications · similar sizeTimex Expedition Pioneer Titanium Automatic GMTTimexExpedition Pioneer Titanium Automatic GMT$72941.0 mm13.5 mm thick78.6 gOthersame category · same style · shared complications · similar size
Porsche Design1919 Globetimer (Titanium)$2,35042.0 mm14.9 mm thickOthersame category · same style · shared complications · similar size

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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

Frequently asked questions

What is the case material of the Seiko Brightz World Time Executive SAGA186 (Titanium)?

The Seiko Brightz World Time Executive SAGA186 (Titanium) has a grey titanium (diamond shield hard coating) case with a titanium caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Seiko Brightz World Time Executive SAGA186 (Titanium)?

It is 43.5 mm in diameter, 12 mm thick, and water resistant to 100 m.

How much does the Seiko Brightz World Time Executive SAGA186 (Titanium) weigh?

About 93 g.

How much does the Seiko Brightz World Time Executive SAGA186 (Titanium) cost, and is it available?

It is no longer offered new; the guide keeps it as an archive reference for the used market.

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