The SRPG31K1 is a 39.4 mm automatic field-style watch featuring a matte grey dial and Arabic numerals, paired with a grey NATO strap. Powered by Seiko’s Caliber 4R36 (≈41 hr power reserve, manual winding, hacking), it includes a day-date display, curved Hardlex crystal, display screw-down case back, and 100 m water resistance. Lightweight at 77 g, it offers rugged usability, legibility, and strong value—popular as a dependable everyday mechanical watc
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