Seiko 5 Sports GMT Men's Automatic Watch - HDB001K1

The Seiko 5 Sports HDB001K1 Field GMT combines the rugged character of a classic field watch with the practicality of a mechanical GMT function. Its green dial, bold Arabic numerals and contrasting orange 24-hour hand create a distinctive military-inspired appearance, while the 39.4 mm stainless-steel case provides a versatile size for everyday wear.

Powering the HDB001K1 is Seiko's Caliber 4R34 automatic movement, which also supports manual winding. With 24 jewels and approximately 41 hours of power reserve, the movement provides reliable mechanical timekeeping while the dedicated 24-hour hand allows the wearer to track a second time zone. A date display and stop-seconds function add further practicality.

The stainless-steel case measures 39.4 mm in diameter and 13.6 mm thick, with a 47.9 mm lug-to-lug measurement. A curved Hardlex crystal protects the dial, while LumiBrite hands and indexes enhance visibility in low-light conditions.

Designed for everyday versatility, the HDB001K1 offers 100 metres / 10 bar water resistance, a stainless-steel bracelet with a secure three-fold clasp, and a transparent screw case back that reveals the mechanical movement.

• Reference: HDB001K1
• Caliber 4R34 automatic GMT movement
• Automatic with manual winding
• Approximately 41-hour power reserve
• 24 jewels
• Green dial
• Orange 24-hour GMT hand
• Stainless-steel case
• 39.4 mm case diameter
• 13.6 mm case thickness
• 47.9 mm lug-to-lug
• Curved Hardlex crystal
• Stainless-steel bracelet
• 20 mm lug width
• 24-hour dual-time display
• Date display
• Stop-seconds function
• LumiBrite hands and indexes
• 100 m / 10 bar water resistance
• See-through screw case back
• Three-fold clasp with secure lock and push-button release
• Approx. 147 g weight
• Magnetic resistance: 4,800 A/m