Current Production
Astron GPS Solar Limited Edition
SEIKO SSH137
MSRP
$2,900 USD
Verified Aug 18, 2026
Case diameter42.7 mm
Lug-to-lug48 mm
Thickness12.2 mm
Case materialTitanium case with black super-hard coating
CrystalSapphire crystal with super-clear coating
Water resistance100 m
MovementGPS Solar, Caliber 5X53, Powered by light energy, with no battery change required, Power reserve: approximately 6 months once fully charged
Calibre5X53
DialBlack
Bracelet or strapTitanium bracelet with black super-hard coating. Additional coordinating bi-color silicone strap
Specifications as published by Seiko →
Last verified Aug 18, 2026