The Seiko 5 Sports Field SRPG31 is a mechanical field watch with a 39.4 mm stainless steel case, a black dial with white numerals, and a day-date window at 3 o'clock. It runs Seiko's 4R36 automatic movement, which hand-winds and hacks, and it has 100 m water resistance and a see-through caseback. It suits buyers who want a rugged everyday automatic without paying for a Swiss brand. Against rivals like the Hamilton Khaki Field Mechanical, it adds an automatic movement and day-date but is thicker and less slim on the wrist.
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Owners treat the SRPG31 as a solid entry automatic: legible, tough enough for daily wear, and good value for a mechanical field watch. Common complaints are the thickness, the Hardlex crystal and the plain stock strap.
The Seiko 5 Sports Field Series SRPG31 is a men's wristwatch with a blue dial and square indexes. The case is stainless steel and measures 39.4 mm in diameter.
It has an automatic movement, the caliber 4R36. The watch is made in Japan.
