The Titanium Field Guide

Seiko Astron GPS Solar (SSH157)

SSH157J1

The Seiko Astron GPS Solar (SSH157) is a current-production other watch with a Titanium (super-hard coated) case, finished with super-hard coating; ceramic bezel. It measures 43.3 mm across, 13.4 mm thick, 49.5 mm lug to lug, 117 g, and is water resistant to 100 m. Inside is the Seiko 5X83 gps solar movement, with 6 months (full charge) power reserve. Complications: Chronograph, Worldtimer, GMT, Perpetual calendar, Power reserve, Date. Priced from $2,500 (limited to 1,500). Brand origin: Japan.

Titanium other watchesUnder $3,000GMTChronograph
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ReferenceSSH157J1
TypeOther
Price$2,500 · limited to 1,500
Case diameter43.3 mm
Thickness13.4 mm
Lug-to-lug49.5 mm
Water resistance100 m
Weight117 g
OriginJapan
MovementGPS Solar
CaliberSeiko 5X83
Power reserve6 months (full charge)
ComplicationsChronograph, Worldtimer, GMT, Perpetual calendar, Power reserve, Date
TitaniumTitanium (super-hard coated)
Surface treatmentSuper-hard coating; ceramic bezel
Nickel-freeYes
Bracelet / strapTitanium bracelet
CrystalSapphire (dual-curved, super-clear coating)
Display backNo
DialBlue (Infinite Starry Sky)
LumeLumiBrite
AvailabilityOffered
StatusLimited edition of 1,500 (2024)
High confidence Verified 2026-06-21 Source: Seiko (maker) / aBlogtoWatch Maker / listing ↗
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