Seiko 5 Sports HDB001K1 – Field Series GMT

Mechanical GMT Watch with Khaki Green Dial and Versatile Field Watch Character

The Seiko 5 Sports HDB001K1 combines the functional character of a classic field watch with a mechanical GMT function. Its understated color scheme is inspired by traditional military and outdoor clothing, giving the watch a striking yet everyday-appropriate appearance.

The khaki green dial has a sandblasted, slightly textured surface. This fine structure creates natural depth without overshadowing clear legibility. Embossed Arabic numerals, a clear minute track, and the contrasting GMT hand emphasize the watch's functional character.

With a diameter of 39.4 mm, the HDB001K1 offers balanced proportions. The multi-row stainless steel bracelet sits comfortably on the wrist and complements the sporty-classic design.

GMT Function and Legibility

The automatic Seiko Caliber 4R34 allows for the display of a second time zone via an additional 24-hour hand. Together with the surrounding 24-hour scale, this can be used, for example, to read the time at home or in another time zone.

LumiBrite on the hands and indices aids legibility in the dark. The color-highlighted GMT hand is clearly distinguishable from the local time hands.

Movement and Functions

– Mechanical automatic movement Seiko 4R34
– Automatic winding with manual winding capability
– Frequency: 21,600 vibrations per hour
– Power reserve: approximately 41 hours
– Manufacturer's stated accuracy: +45 to -35 seconds per day
– 24 jewels
– Display of a second time zone via the 24-hour hand
– Date display
– Hacking seconds for precise time setting

Case and Dial

– Case material: Stainless steel
– Dial color: Khaki green
– Sandblasted, finely textured dial surface
– Embossed Arabic numerals
– LumiBrite on hands and indices
– Glass: Domed Hardlex glass
– Case back: Screw-down, transparent display back
– Water resistance: 10 bar
– Magnetic resistance: 4,800 A/m

Dimensions

– Diameter: 39.4 mm
– Height: 13.6 mm
– Lug-to-lug length: 47.9 mm
– Lug width: 20 mm
– Weight: approximately 147 g

Bracelet and Clasp

– Multi-row stainless steel bracelet
– Original bracelet length: approx. 21 cm
– Folding clasp with safety pushers and safety catch

User Manual

The official user manual for the Seiko Caliber 4R34 can be found here:

Seiko Customer Service – User Manual for Caliber 4R34

Shipping

– In stock and ready for immediate delivery
– Free shipping within Germany