Seiko 5 Sports GMT Ref. SSK023 (commonly known as the "Field GMT")
GMT/Travel Watch (Field Watch Style) · Seiko (Seiko Group Corporation), positioned in the affordable luxury and reliable everyday tool watch tier
Period: Modern Luxury / Neo-Vintage (2020s)
Type
GMT/Travel Watch (Field Watch Style)
Brand
Seiko (Seiko Group Corporation), positioned in the affordable luxury and reliable everyday tool watch tier
Movement
Automatic, Seiko Caliber 4R34, operating at 21,600 vph (3 Hz), with approximately 41 hours of power reserve and 24 jewels
Dimensions
Case diameter: 39.4 mm, case thickness: 13.6 mm, lug-to-lug distance: 47.9 mm, lug width: 20 mm
Description
The Seiko 5 Sports GMT Ref. SSK023 introduces a highly sought-after field watch aesthetic combined with a practical GMT complication. Featuring a crisp white dial, bold orange GMT hand, and fixed steel 24-hour bezel, it offers incredible everyday versatility. Its compact 39.4mm case and comfortable 4 o'clock crown make it an ideal travel companion for enthusiasts seeking high value and mechanical pedigree.
Key Features
Mechanical GMT complication under an accessible price point, fixed steel 24-hour bezel, field-style dial layout with 24-hour inner track, and the ergonomic 4 o'clock crown placement characteristic of the Seiko 5 Sports line
Dial Description
Matte white dial with full Arabic numeral hour markers (1-12) and an inner 24-hour track. Luminous arrow hands, distinctive orange GMT hand, and a date window at the 3 o'clock position with a magnifying cyclops
Case Material
Stainless steel 316L with a combination of satin-brushed and polished finishing
Crystal Type
Hardlex mineral crystal with a flat profile and a cyclops lens over the date window
Bezel Details
Fixed stainless steel bezel with an engraved 24-hour GMT scale in black numerals
Crown & Pushers
Push-pull crown positioned unusually at the 4 o'clock position for improved wrist comfort, featuring the Seiko 5 logo
Bracelet or Strap
Stainless steel 5-link jubilee-style bracelet featuring brushed outer and polished inner links, secured with a folding clasp and safety lock
Caseback Details
Screw-down exhibition display caseback featuring a mineral glass window revealing the automatic mechanical movement
Movement Type
Automatic, Seiko Caliber 4R34, operating at 21,600 vph (3 Hz), with approximately 41 hours of power reserve and 24 jewels
Water Resistance
100 meters (10 ATM / 330 feet), suitable for swimming, snorkeling, and recreational water sports, but not professional scuba or saturation diving
Origin & Provenance
Japanese manufacturer with global production facilities; utilizes Seiko in-house mechanical movements
Age Estimate
Modern production, circa 2023-present
Cultural Significance
A monumental release in modern entry-level horology, democratizing the GMT complication and bridging the gap between vintage field aesthetics and contemporary travel watch demands
Condition Notes
Brand new or excellent condition with no visible scratches, dings, or wear on the case, crystal, bezel, or bracelet
Value Estimate
Retail MSRP around $475 USD, with secondary market trading close to or slightly below retail depending on condition and availability
Care & Maintenance
Recommended mechanical service interval of 5 to 7 years, routine water resistance testing annually, and avoidance of strong magnetic fields to protect the unregulated hairspring
Similar Watches
Seiko 5 Sports SSK001 (Dive-style bezel version), Hamilton Khaki Navy Scuba GMT, and Citizen Promaster Land GMT
Interesting Facts
The SSK series marks the first true mechanical GMT watch offerings under the modernized Seiko 5 Sports umbrella, bringing high-end travel complications to the sub-$500 market