Seiko SSK023K1 — 5 Sports Field Sports Style GMT Automatic
The Seiko SSK023K1 is a field-watch GMT from Seiko's 5 Sports collection — powered by the same 4R34 automatic GMT calibre found in the SKX GMT and Presage Style60's GMT ranges, but housed in a compact 39.4 mm case with a curved Hardlex crystal, Arabic numeral markers, and no rotating bezel. At 39.4 mm it is the smallest GMT in Seiko's current 5 Sports lineup — smaller than the 42.5 mm SKX GMT and the 40.8 mm Presage Style60's — making it the most wearable option for smaller wrists and the most understated for daily wear. The Arabic numerals and field-watch aesthetic give it a military-inspired character that neither the sport-dive SKX GMT nor the dressy Presage GMT can deliver.
Key Features
- Seiko 4R34 automatic GMT calibre — approx. 41-hour power reserve, hand-winding capability, see-through case back
- GMT function — 24-hour hand tracks a second timezone simultaneously
- Black dial with Arabic numeral markers — military/field-watch legibility at a glance, the most readable marker style
- Date display — practical daily utility
- 39.4 mm stainless steel case — the most compact GMT in Seiko's current 5 Sports range
- Curved Hardlex crystal — Seiko's proprietary hardened mineral glass with a gentle curve that adds depth
- No rotating bezel — clean, field-watch case profile
- LumiBrite on hands and hour markers — full low-light and field legibility
- 10 bar (100 metres) water resistance — genuine swim-ready capability
- Stainless steel bracelet in silver — robust all-metal daily-wear package
Why You'll Love It
The SSK023K1 is the GMT for the buyer who wants the smallest case, the most readable dial, and a military-inspired aesthetic. At 39.4 mm it sits comfortably on wrists that find the 42.5 mm SKX GMT too large, and the Arabic numerals make it the fastest watch in the GMT range to read at a glance — no counting batons, no decoding indices, just clear numbers at every hour. The field-watch design language means it pairs with T-shirts, cargo pants, and outdoor gear as naturally as it does with weekend smart-casual. Same 4R34 GMT calibre, same 41-hour power reserve, same 100 m WR — the full GMT specification in the most compact, most legible package.
SSK023K1 vs SKX GMT (SSK001/003/005) vs Presage GMT (SSK009J1)
All use the same 4R34 automatic GMT calibre. The SSK023K1 is a Field GMT: 39.4 mm, curved Hardlex, Arabic numerals, no bezel, 100 m WR — the compact, military-inspired option. The SSK001/003/005 are SKX GMTs: 42.5 mm, flat Hardlex, batons, two-way bezel, 100 m WR — the sport-dive option. The SSK009J1 is a Presage GMT: 40.8 mm, box-shaped Hardlex, batons, no bezel, 50 m WR — the dressy option. Three GMT personalities, one calibre.
The Seiko Story
Since 1881, when Kintaro Hattori founded a clock and watch shop in Ginza, Tokyo, Seiko has been at the forefront of timekeeping innovation — from the world's first quartz wristwatch in 1969 to today's GPS Solar and Spring Drive technologies. The Seiko 5 Sports Field collection draws from military field-watch heritage — robust, readable, unpretentious. The SSK023K1 adds GMT travel utility to that philosophy in the most compact, most legible format available.
Backed by Seiko's official warranty. Authentic Seiko 5 Sports, sold by authorised retailer City Chain Singapore.
Explore more Seiko 5 Sports, browse the full Seiko collection, or see all Men's watches at City Chain Singapore.
