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Seiko 5 Sports SKX HDB005K1 Watch
The Seiko 5 Sports SKX HDB005K1 is an automatic watch from the Seiko 5 Sports collection, within the SKX series. Heir to the style of Seiko's classic divers, without being a certified diver. Its stainless steel case measures 42.5 mm in diameter and 14.17 mm thick, and combines a deep green dial with gold details on the hands, indices and bezel. The crystal is curved Hardlex, water resistance is 10 bar (100 metres) and the bracelet is steel with a deployant clasp and safety pusher.
The movement is the 4R36 calibre, automatic with manual winding, 24 jewels, 21,600 vibrations per hour and a 41-hour power reserve. It includes a hacking seconds hand and a dual calendar (day and date) in Spanish and English. The case back is see-through and screw-down, allowing the rotor and mechanism to be observed in operation. The crown is positioned at 4 o'clock, a solution that keeps the wrist free when the hand flexes.
The bezel is unidirectional, steel with a black insert and gold markings. It evokes the original SKX, but on this model it has a more aesthetic than instrumental character: it rotates and has markings, but it is not designed to measure dives. The dial features applied indices with LumiBrite, and the sword-shaped hands also carry luminous material. The case combines polished and brushed finishes. The 22 mm steel bracelet has brushed and polished links, and the deployant clasp with pusher and safety makes it easy to put on and take off without tools.
The deep green of this dial is not just another colour within the SKX series: it is the one that recovers the feel of the Seiko watches of the 2000s, the SNZH, and brings them to the present with the 4R36 calibre. When you put it on with a shirt, the dark green and the gold of the indices and hands give it a dress-watch feel that the black-dial SKX don't have. When you put it on with a T-shirt, the unidirectional bezel and the 42.5 mm case bring back the sporty character. It is not a discreet watch: the 169 g and the 14.17 mm thickness are noticeable on the wrist. It is the SKX for those who want an automatic with presence, but with a colour that sets it apart from conventional divers.
Automatic 4R36 Calibre 41-Hour Power Reserve Green Dial Gold Details Curved Hardlex 100 m 42.5 mm
Why choose this watch?
Green and gold dial: the SKX that doesn't look like an SKX
Most SKX are dark. This one opts for a deep green with gold hands, indices and markings. The result is a sports watch that, with a shirt, passes as formal without effort.
4R36 calibre with manual winding and hacking
The 4R36 is Seiko 5's benchmark automatic: 41-hour power reserve, 24 jewels and hacking seconds. Manual winding allows you to charge it without moving your wrist, and hacking lets you set it to the second.
42.5 mm and 169 g: presence without disguise
It is not a discreet watch. The 42.5 mm case and steel bracelet are noticeable on the wrist. It is a watch with volume, designed for those who want to feel they are wearing a real automatic.
Unidirectional bezel: a nod to classic divers
The bezel evokes the original SKX, but on this model it has a more aesthetic than instrumental character. It rotates and has markings, but it is not designed to measure dives. It is the detail that gives it the air of a dive watch without being one.
Technical specifications
Movement and functions
- Type: automatic with manual winding.
- Calibre: Seiko 4R36.
- Power reserve: 41 hours.
- Frequency: 21,600 vibrations per hour.
- Jewels: 24.
- Functions: hours, minutes, seconds, day and date (dual language Spanish/English).
- Hack function: yes.
- Accuracy: +45 to -35 seconds per day.
Case and dimensions
- Reference: HDB005K1.
- Brand: Seiko.
- Collection: Seiko 5 Sports, SKX series.
- Case material: stainless steel.
- Diameter: 42.5 mm.
- Thickness: 14.17 mm.
- Lug-to-lug: 46.0 mm.
- Weight: 169 g.
- Crown: pull type at 4 o'clock.
- Case back: see-through and screw-down.
- Water resistance: 10 bar (100 metres).
Dial, crystal and bezel
- Crystal: curved Hardlex.
- Dial: green with gold details.
- Hands and indices: with LumiBrite.
- Bezel: unidirectional, steel with black insert and gold markings.
- Calendar: day and date at 3 o'clock.
Bracelet and presentation
- Bracelet material: stainless steel.
- Width: 22 mm.
- Clasp: deployant with pusher and safety.
Frequently asked questions
Is it a dive watch?
No. It is a Seiko 5 Sports with a unidirectional bezel and 100 metres of water resistance, but it does not have ISO dive certification. The bezel is more decorative than instrumental: it evokes classic divers, but it is not designed to measure dives. The 100 metres cover swimming and light water use. For certified diving, you need a Promaster or a specific diver.
Is it comfortable at 169 g and 14.17 mm thick?
It is not a light or thin watch. It is noticeable on the wrist. But the 46 mm lug-to-lug and the deployant clasp help it wear well on medium wrists. It is a watch with presence, not one that goes unnoticed.
What is the difference with the original SKX007?
The SKX007 is discontinued and did not have manual winding or hacking. This HDB005K1 recovers the SKX DNA (case, bezel, 100 m) but adds the 4R36 calibre, with manual winding and hacking seconds, and a green dial with gold details that did not exist on the original.
Is the bezel for diving?
No. The bezel is unidirectional and has markings, but on this SKX it has a more aesthetic than instrumental character. It evokes Seiko's classic divers, but it is not certified for diving. It can be used to measure elapsed time, but that is not its main function.
Can it get wet?
Yes. 100 metres covers splashes, rain, hand washing and surface swimming. It is not intended for diving or for pressing the crown underwater.
