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Round stainless steel watch with black open heart dial and stainless steel bracelet

Seiko

Seiko Presage Style 60's Open Heart Automatic Watch SSA425J1

SKU CH-TZX3-01JJA

A 40 mm automatic watch with an open-heart dial, stainless-steel case and bracelet, and 50 m water resistance

  • StyleCasual
  • MaterialStainless Steel
  • MovementAutomatic
  • ShapeRound
  • Dial ColorBlack
  • Dial MarkersIndex
  • Open-heart dial reveals the automatic movement in motion
  • 00 mm stainless-steel case fits comfortably on the wrist
  • 00 mm case thickness keeps the profile slim under a cuff
  • 50 m water resistance handles splashes and brief immersion
  • Hardlex crystal and deployment clasp add everyday durability

Presage Style 60's Open Heart

The Seiko Presage Style 60's Open Heart SSA425J1 is a men's automatic watch with a 40.00 mm stainless steel case and a black dial that reveals the movement through an open-heart window. A see-through case back and Hardlex crystal complete the vintage-inspired aesthetic. It suits wearers who value mechanical visibility in a casual daily accessory.

Build integration and fit

The 13.00 mm case thickness sits close to the wrist under shirt cuffs, while the fixed bezel keeps the profile streamlined. Stainless steel construction on both case and bracelet provides consistent weight and finish. Water resistance to 50 m covers hand-washing and rain but not swimming or diving, so the watch stays on during routine tasks without special care.

Bundled impact

The integrated stainless steel bracelet uses a deployment clasp that secures with a single motion and eliminates the need for a separate strap purchase. Hardlex crystal resists everyday scratches better than standard mineral glass, reducing early cosmetic wear. No additional tools or accessories are required to start wearing the watch immediately.

Highlights

  • Open-heart dial reveals the automatic movement in motion
  • 00 mm stainless-steel case fits comfortably on the wrist
  • 00 mm case thickness keeps the profile slim under a cuff
  • 50 m water resistance handles splashes and brief immersion
  • Hardlex crystal and deployment clasp add everyday durability

Specifications

BrandSeiko
StyleCasual
MaterialStainless Steel
MovementAutomatic
ShapeRound
Dial ColorBlack
Dial MarkersIndex
DisplayAnalog
Band MaterialStainless Steel
FastenerDeployment
GenderMale
ConditionNew
BezelFixed Bezel
Case BackSee Through Case Back
Case MaterialStainless Steel
Case Thickness40.00 mm
CrystalHardlex Crystal
Water-Resistant50m
Special FeaturesHardlex Crystal,Deployment Clasp

Questions about this item

How long will the automatic movement run on the SSA425J1 if I do not wear it for a day?

The automatic movement relies on wrist motion to wind the mainspring; without daily wear it will stop once the stored energy is exhausted, so a watch winder or regular wear keeps it running.

How warm does the 13.00 mm thick case get and how much noise does the movement make during all-day wear?

The stainless steel case stays at skin temperature and the mechanical movement is silent in normal use; no heat or audible ticking is noticeable on the wrist.

What tools or accessories are needed to adjust the stainless steel deployment clasp on the SSA425J1?

The deployment clasp features micro-adjustment holes that can be resized with a standard spring-bar tool or a small pin; no specialised equipment is required.

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