
Ø42.5 mm · automatic · 100 m · $495 · Cheapest · GMT · Hardlex
Seiko 5 Sports GMT SSK001
The cheapest mechanical GMT from a major maker, and the one Hardlex exception on the page: $495 buys a 4R34 automatic GMT and Seiko's own hardened mineral glass, and that is the trade. 42.5 mm case, 46 mm lug-to-lug, 13.6 mm thick, 100 m, bidirectional 24-hour bezel. The 4R34 is a caller GMT (the 24-hour hand sets independently, the local hour does not), which the GMT list explains. The SSK003 is the blue and red colourway at the same price. Long Island Watch listed it at $396 and sold out on the check date. The alternative for the money is the Nodus Sector II Sport at $525: no GMT, sapphire, and an assembly line on the page, $30 apart.
Spec sheet: seikousa.com, checked 19 September 2026. Seiko brand page.


















































