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Round stainless steel watch with black dial and matching bracelet

Seiko

Seiko 5 Automatic SNKK31J 38.00 mm Stainless Steel Watch

SKU CH-TAQ4-ZX6BZ

A Japan-made automatic watch with a 38.00 mm stainless steel case, mineral crystal, day-date display and 30 m water resistance

  • StyleSports
  • MaterialStainless Steel
  • MovementAutomatic
  • ShapeRound
  • Dial ColorBlack
  • Dial MarkersIndex
  • Automatic 7S26 calibre with 21 jewels
  • Japan-made stainless steel case and bracelet
  • Day and date display at three o'clock
  • Mineral crystal protects the black dial
  • 30 m water resistance for daily wear

Daily wear automatic watch

The Seiko 5 SNKK31J is a Japanese-made automatic watch built for continuous daily use. Its 38.00 mm stainless steel case and matching bracelet resist wear through 24/365 service. The 7S26 calibre with 21 jewels powers analog time, day and date displays without a battery. A deployment clasp secures the band on the wrist.

Sustained operation behaviour

The automatic movement stays wound through natural wrist motion during all-day wear, removing the need for daily manual winding. Mineral crystal protects the black dial against routine knocks and desk contact. Water resistance to 30 m handles hand-washing and rain but does not support swimming or submersion. The fixed bezel and pull/push crown maintain seal integrity over years of use.

Practical limits of 30 m rating

The 30 m water-resistance rating covers splashes and brief immersion only; it is not rated for swimming, diving or high-pressure water jets. Buyers who need a watch for pool laps, snorkelling or showering should choose a model with a higher depth rating. The mineral crystal resists daily scratches but can fracture under sharp impact. Automatic accuracy varies with position and temperature.

Highlights

  • Automatic 7S26 calibre with 21 jewels
  • Japan-made stainless steel case and bracelet
  • Day and date display at three o'clock
  • Mineral crystal protects the black dial
  • 30 m water resistance for daily wear

Specifications

BrandSeiko
StyleSports
MaterialStainless Steel
MovementAutomatic
ShapeRound
Dial ColorBlack
Dial MarkersIndex
DisplayAnalog
DateDate
Band MaterialStainless Steel
FastenerDeployment Clasp
GenderMale
ConditionNew
BezelFixed Bezel
Case BackPull/Push Crown
Case MaterialStainless Steel
Case Thickness38.00 mm
CrystalMineral Crystal
Water-Resistant30m
Special FeaturesMineral Crystal,Deployment Clasp,Day and Date Display,Pull/Push Crown

Questions about this item

How loud is the 7S26 automatic movement when the watch runs continuously?

The 7S26 calibre with 21 jewels operates silently on the wrist; only a faint rotor spin is audible in a quiet room when the arm moves.

What must the owner already have to keep this automatic watch running day and night?

Regular wrist motion winds the mainspring; if the watch sits unworn for about 24 hours it stops and needs a manual wind via the pull/push crown.

Will the 38.00 mm case and 30 m water rating sit comfortably alongside vintage Seiko divers?

The smaller 38.00 mm diameter and 30 m rating make it a dressier companion; it shares the same 7S26 lineage but lacks the screw-down crown of older divers.

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