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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

  • Watch movementAutomatic
  • Product shapeRound
  • Watch face colorBlack
  • Dial markingsIndex
  • Display typeAnalog
  • Strap materialStainless Steel
  • 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.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $393.99
Pricier than about 88% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameSeiko
Design styleCasual
Watch face colorBlack
Item conditionNew
Display
Display typeAnalog
Size & build
Main materialStainless Steel
Product shapeRound
Strap materialStainless Steel
Closure typeDeployment
Bezel typeFixed Bezel
Case constructionSee Through Case Back
Housing materialStainless Steel
Case size40 mm
Watch glassHardlex Crystal
Environment & compliance
Water resistance50m
More details
Watch movementAutomatic
Dial markingsIndex
Suitable forMale

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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