Seiko 5 Sports SSK001J1 Automatic GMT Watch – Black Dial Japan

The Seiko 5 Sports SSK001J1 is a Japan-market automatic GMT built for everyday wear and dual-time tracking. A black dial, bi-colour 24-hour bezel, and 4R34 movement give you a practical travel companion without stepping into luxury-GMT pricing.

If you want a mechanical GMT that can handle office days, weekend travel, and swimming, this model sits in the sweet spot of the Seiko 5 Sports range: solid water resistance, clear lume, and a bracelet that wears well on most wrists.

Why the SSK001J1 works

• True GMT function — independent 24-hour hand with a rotating dual-time bezel for a second timezone at a glance.
• Caliber 4R34 — automatic winding with manual wind capability, 24 jewels, and roughly 41 hours of power reserve.
• Wearable sports case — 42.5 mm stainless steel case, about 13.6 mm thick, 22 mm lug width, and a five-row bracelet with push-button fold-over clasp.
• Daily-ready durability — 100 m water resistance, Lumibrite hands and markers, date window, and magnetic resistance rated to 4,800 A/m.
• Japan reference — SSK001J1 is the Japan-market code for this black dial / grey-black bezel configuration.

Who it suits

Buyers who need a second timezone without a complicated tool watch, Seiko 5 fans who want more than a three-hand sports model, and anyone shopping for an automatic GMT in Australia with authentic stock and Sydney dispatch.

Specifications

• Brand: Seiko
• Collection: Seiko 5 Sports GMT
• Reference / SKU: SSK001J1
• Movement: Seiko Caliber 4R34 automatic GMT (manual winding capable)
• Jewels: 24
• Power reserve: approx. 41 hours
• Case: stainless steel, 42.5 mm diameter, approx. 13.6 mm thickness
• Lug width: 22 mm
• Crystal: hardlex (as fitted to this Seiko 5 Sports GMT generation)
• Dial: black with applied indices; Lumibrite on hands and markers
• Bezel: bidirectional rotating 24-hour dual-time bezel (black / grey)
• Functions: hours, minutes, seconds, date, GMT / dual-time
• Bracelet: stainless steel five-row with three-fold push-button clasp
• Water resistance: 10 bar / 100 metres
• Magnetic resistance: 4,800 A/m
• Approx. weight: 161 g

Buying from Chronospride

Authentic Seiko stock, inspected before dispatch from Sydney. Free shipping Australia-wide on eligible orders. Covered by Chronospride purchase support as published on our store policies — not manufacturer warranty claims.

What movement does the Seiko SSK001J1 use?

The SSK001J1 runs Seiko’s 4R34 automatic GMT caliber. It self-winds on the wrist, can be hand-wound, and offers about 41 hours of power reserve with a central GMT hand for dual-time tracking.

Is the Seiko 5 Sports SSK001J1 a true GMT?

Yes. It uses an independent 24-hour hand paired with a rotating 24-hour bezel so you can track a home or destination timezone alongside local time. It is a practical dual-time sports watch rather than a professional pilot GMT complication.

What is the water resistance of the SSK001J1?

100 metres (10 bar). Suitable for swimming and everyday exposure. Not intended for scuba diving with compressed air.

Is the SSK001J1 suitable for everyday wear in Australia?

Yes. The 42.5 mm case, 100 m water resistance, and robust bracelet make it a strong daily automatic. The GMT hand is useful if you work across timezones or travel regularly.

How does the SSK001 compare to other Seiko 5 Sports GMTs?

The SSK001J1 is the classic black dial / grey-black bezel Japan configuration. Sibling references (for example SSK003, SSK005, and later colourways) share the same case architecture and 4R34 GMT platform with different dial and bezel treatments.

Where can I buy the Seiko SSK001J1 in Australia?

At Chronospride. We stock authentic pieces, inspect them before dispatch, and ship from Sydney with free shipping Australia-wide on eligible orders.