The Seiko 5 Sports Field GMT (SBSC013 / SSK025) is a tactical, “stealth” interpretation of the classic field watch. Released as the first GMT in the Seiko 5 Sports Field series, it blends rugged military aesthetics with the practical ability to track a second time zone.
Detailed Description
The watch features a matte black “sandblasted” dial and a matching black hard-coated (PVD/Ion-plated) stainless steel case, giving it a muted, non-reflective look suitable for “trench watch” inspiration.
- Dial & Hands:Â The dial uses a double-scale layout with bold Arabic numerals for local time and an inner scale for 24-hour tracking. A prominent pentagonal GMT hand in red-orange provides a sharp contrast for high legibility.
- GMT Functionality:Â It utilizes an “office” or “caller” GMT movement (Caliber 4R34), allowing you to independently adjust the 24-hour hand to track a second time zone without stopping the main time.
- Durability & Wear:Â Built for everyday adventure, it has a 100m water resistance rating and a curved Hardlex crystal that sits slightly proud of the fixed bezel. It is paired with a black calfskin leather NATO-style strap that features blacked-out hardware to match the case.
- JDM vs. International: The SBSC013 is the Japanese Domestic Market (JDM) version, which often includes “Made in Japan” on the dial, whereas the SSK025 is the global reference.
Technical Specifications
| Feature | Specification |
|---|---|
| Model Numbers | SBSC013 (JDM) / SSK025 (International) |
| Movement | Caliber 4R34 Automatic (Hand-winding & Hacking) |
| Power Reserve | Approx. 41 hours |
| Case Material | Stainless Steel with Black Hard Coating |
| Case Diameter | 39.4 mm |
| Case Thickness | 13.6 mm |
| Lug-to-Lug | 47.9 mm |
| Lug Width | 20 mm |
| Crystal | Curved Hardlex |
| Luminescence | Lumibrite on hands and indexes |
| Water Resistance | 10 bar (100 meters / 330 feet) |
| Strap | Black Calfskin Leather NATO-style |
| Case Back | See-through / Exhibition Screw Case Back |
| Weight | Approx. 79.0g |
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