The Seiko 5 Sports SSK001J1 is the Japan-market black-dial GMT: a steel sports watch for a second time zone, without a luxury-GMT price and without pretending to be a professional diver. The dial in these listing photos reads Made in Japan. Calibre 4R34, a 42.5 mm case, and 100 m water resistance make it a daily watch first.
Use it for office days, weekend trips, and swimming. Do not treat it as a 200 m scuba watch. The crown is a pull-out crown with no guards, not a screw-down dive crown. Chronospride has this SSK001J1 in stock.
Why the SSK001J1 works
- Dual time, stated plainly. The 4R34 has a central 24-hour hand for a second zone, read against the rotating 24-hour bezel. The hour hand does not jump on its own the way a traveler GMT does.
- Calibre 4R34. Automatic, hand-winding, and hacking, with 24 jewels, about 41 hours of power reserve, and a date at 3. There is no day window.
- SKX-inspired case. 42.5 mm wide, 13.6 mm thick, 46.0 mm lug-to-lug, and 22 mm between the lugs. Hardlex crystal, with a magnified date.
- Black and grey bezel. Night hours sit on the black half, day hours on the grey half. Seiko uses a Hardlex insert on this bezel. The GMT hand is red. Hands and markers carry Lumibrite.
- Five-row bracelet. Polished centre links, three-fold clasp with a push-button release. Seiko’s US sheet lists the weight at 161 g.
Who it suits
Buyers who want a Seiko 5 Sports GMT in Australia, in the black dial, and who like the Japan-market SSK001J1 reference. If you only want a three-hand Seiko 5, this is more watch than you need. If you keep an eye on a second city, the 24-hour hand earns its place. It is not the watch to buy if you want a screw-down crown or 200 m water resistance.
Specifications
- Brand: Seiko
- Collection: Seiko 5 Sports
- Reference: SSK001J1, the Japan-market code for the black SSK001 GMT
- Movement: Seiko calibre 4R34, automatic with manual winding and hacking
- Jewels: 24
- Power reserve: about 41 hours
- Functions: hours, minutes, seconds, date at 3, central 24-hour hand
- Case: stainless steel, 42.5 mm diameter, 13.6 mm thick, 46.0 mm lug-to-lug
- Lug width: 22 mm
- Crystal: Hardlex, with a magnified date
- Crown: pull-out, at 4, no crown guards
- Bezel: rotating 24-hour bezel, black and grey, Hardlex insert
- Dial: black, applied markers, Lumibrite on hands and indexes. The front photos read Made in Japan at 6
- Bracelet: stainless steel five-row, three-fold clasp with push-button release
- Case back: see-through screw back. One gallery frame is filed as SSK001K1 and shows Made in Japan, 10 bar, and 24 jewels
- Water resistance: 10 bar / 100 metres
- Magnetic resistance: 4,800 A/m
- Weight: 161 g on Seiko’s US specification sheet
Figures for diameter, thickness, lug-to-lug, lug width, calibre, power reserve, water resistance, magnetic resistance, and weight follow Seiko’s SSK001 specification sheet. They also match the size attributes already stored on this page. One retailer sheet lists 168 g. We are not publishing that as a second official weight.
Buying the SSK001J1 from Chronospride
Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page. More of the range sits in Japan-made Seiko watches.
Frequently asked questions
What movement does the Seiko SSK001J1 use?
Seiko calibre 4R34. It is an automatic movement with hand-winding and a hacking seconds hand, 24 jewels, and about 41 hours of power reserve. The extra hand is a 24-hour hand for a second time zone. The date is at 3. There is no day display.
Is the Seiko 5 Sports SSK001 a traveler GMT?
No. It is a practical dual-time sports watch. You use the central 24-hour hand and the rotating 24-hour bezel to track a second zone. The hour hand does not jump independently the way it does on a traveler GMT. Seiko describes the 4R34 function as a 24-hour hand for dual time, plus a stop-seconds function and a date.
What is the water resistance of the SSK001J1?
100 metres, or 10 bar. That covers rain, handwashing, and swimming. It is not a scuba diver, and the crown is not screw-down. Rinse it after salt water and do not operate the crown while it is wet.
Is the SSK001J1 made in Japan?
The dial in these listing photos is marked Made in Japan. SSK001J1 is the Japan-market reference for this black GMT. A separate gallery frame, filed under the export code SSK001K1, shows an exhibition case back also marked Made in Japan, with 10 bar and 24 jewels. We are not publishing a serial from that frame.
Is the SSK001 suitable as an everyday watch in Australia?
Yes, if a 42.5 mm sports watch and a steel bracelet suit your wrist. Lug-to-lug is 46.0 mm, so it wears closer to a compact diver than the diameter alone suggests. The 100 m rating and the solid bracelet are enough for daily wear. The GMT hand is useful if you work across time zones or travel. It is the wrong buy if you need 200 m and a screw-down crown.
How does the SSK001J1 compare with other Seiko 5 Sports GMTs?
SSK001J1 is the black-dial Japan-market reference. Blue and orange siblings share this 4R34 case and change the dial and bezel colour. The international black reference is often listed as SSK001K1. Compare the dial text and the case back on the watch you receive rather than assuming every export code is engraved the same way.
Where can I buy the Seiko 5 Sports SSK001J1 in Australia?
At Chronospride. Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.
| Brand | Seiko |
|---|---|
| Case-Size | 42.5mm |
| Band-Width | 22mm |
| Lug to lug size | 46mm |
| Lug-Width | 22mm |
| Case Thickness | 13.6mm |
| MPN | SSK001J1 |
| Gender | Men's |
| Band-Material | Stainless Steel |
| Case-Material | Stainless Steel |
| Movement | Automatic |
| Band-Colour | Silver |
| Calibre | 4R34 |
| Case-Colour | Silver |
| Face-Colour | Black |
| EAN | 029665214959 |
| UPC | 029665214959 |
| Jewels | 24 |
| Power reserve | 41 hours |
| Watch-Shape | Round |
| Water-Resistance-Rating | 100M |