The Titanium Field GuidePicks of the month

Seiko Astron GPS Solar Chronograph 145th Anniversary LE SSH186

The Seiko Astron GPS Solar Chronograph 145th Anniversary LE SSH186 is a 44.1 mm titanium chronograph with a 5X83 solar quartz movement. The case is surface-hardened, which guards against the scuffs bare titanium picks up.

All Seiko watchesChronograph watchesOn a titanium braceletMicro-adjust braceletSolarWorldtimerGMT
Price
$3,300
Material
Titanium
Grade / type
Titanium (black super-hard coating)
Water resistance
100 m
Type
Chronograph
Case diameter
44.1 mm
Thickness
14.4 mm
Origin
Japan
Movement
GPS solar quartz chronograph
Caliber
5X83
Power reserve
6 months (full charge)
Complications
Chronograph, GMT, Worldtimer, Date
Colour
Black
Surface treatment
Black super-hard coating
Finish technology
Surface hardening
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Titanium bracelet, black super-hard coating
Matching bracelet
Standard
Micro-adjust clasp
Yes
Crystal
Sapphire, sapphire bezel insert
Display back
No
Dial
Black (gold accents, Solar Eclipse texture)
Dial colours
Black
Availability
Offered
Status
Limited edition of 1,450
Not published
Reference, Lug-to-lug, Weight, Hardness, Construction, Caseback, Lume
Medium confidence Verified Jul 2026 Source: Seiko (Astron SSH186)
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Frequently asked questions

What grade of titanium is the Seiko Astron GPS Solar Chronograph 145th Anniversary LE SSH186?

Titanium, with no grade stated. The record is at medium confidence, so check the maker's page before relying on it.

What size is the Seiko Astron GPS Solar Chronograph 145th Anniversary LE SSH186?

The case is 44.1 mm across and 14.4 mm thick. It is water resistant to 100 m.

How much does the Seiko Astron GPS Solar Chronograph 145th Anniversary LE SSH186 cost, and is it available?

It is in production, at a list price of $3,300.

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