The Titanium Field Guide

Seiko Brightz World Time Executive SAGA186 (Titanium)

Archive · used only

The Seiko Brightz World Time Executive SAGA186 (Titanium) is a discontinued watch with a Titanium (Diamond Shield hard coating) case, finished with diamond shield hard coating. At 93 g it sits around the middle for watches in the guide. It ships on a matching titanium bracelet rather than a strap. No longer offered new; listed here as an archive reference for the used market.

Titanium other watchesLightest, rankedOn a titanium braceletSolarWorldtimer
Titanium
Titanium (Diamond Shield hard coating)
Weight
93 g
Water resistance
100 m
Type
Other
Price
– · Y237,600 at launch (JDM); secondary market only
Case diameter
43.5 mm
Thickness
12 mm
Origin
Japan
Movement
Solar radio-controlled quartz (world time)
Caliber
Seiko Cal. 8B54
Complications
Worldtimer, Date
Case shape
Round
Case colour
Natural / grey
Finish technology
Surface hardening
Surface treatment
Diamond Shield hard coating
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Titanium bracelet
Titanium bracelet
Standard
Crystal
Sapphire, super-clear coating
Display back
No
Dial
Black with diamond markers
Dial colours
Black
Availability
No longer offered
Status
No longer in production (discontinued JDM Brightz)
Not published
Reference, Lug-to-lug, Power reserve, Lume Help verify
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.
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Frequently asked questions

What grade of titanium is the Seiko Brightz World Time Executive SAGA186 (Titanium)?

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

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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