Seiko Presage Automatic Open Heart Black Dial Stainless Steel Watch (SSA425J1)
- Sale price
- R 10,129
- List price
- R 13,495
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The Seiko Presage SSA425J1 brings vintage-inspired design into the modern era with a striking open-heart complication that reveals the mechanical soul within. This automatic timepiece features a bold black dial framed by a bi-directional black bezel with rose-gold accents, evoking the sporting chronometers of the 1960s. The open aperture at 7 o'clock offers a mesmerising view of the 4R39 calibre at work, while applied hour markers and a discreet 24-hour subdial at 12 o'clock add both function and visual depth. The round stainless steel case measures 40.5mm in diameter, sized for versatility across wrist profiles, and pairs beautifully with a three-link stainless steel bracelet that balances comfort with refinement.
Powered by Seiko's reliable 4R39 automatic movement with manual winding capability, this watch delivers approximately 41 hours of power reserve and beats at 21,600 vibrations per hour across 24 jewels. The see-through screw-down case back invites enthusiasts to admire the decorated rotor and movement architecture, while the box-shaped Hardlex crystal recalls the domed profiles of mid-century sports watches. Water resistance to 50 metres provides peace of mind for everyday wear, though this is a timepiece designed more for boardroom confidence than deep-water pursuits.
At Cassims & Co., we are proud to present the full range of SEIKO watches as an authorised retailer, ensuring every piece carries the manufacturer's international warranty and our commitment to aftersales care. The Presage collection exemplifies Seiko's dedication to accessible mechanical horology, combining Japanese precision with thoughtful design detail. This SSA425J1 stands as a compelling entry point into open-heart complications, offering visual theatre without sacrificing legibility or everyday wearability.
Whether you are new to automatic watches or adding another chapter to an established collection, the Presage SSA425J1 rewards close inspection. The interplay of brushed and polished surfaces across the case and bracelet, the subtle warmth of rose-gold detailing against black and steel, and the hypnotic pulse of the visible balance wheel all contribute to a watch that invites frequent glances. Visit us at our Mall of the South boutique to experience the SSA425J1 in person, and discover why Seiko remains a benchmark for value-driven mechanical watchmaking. Should you require any adjustments or support after purchase, our watch servicing and repairs team is always on hand to ensure your timepiece performs flawlessly for years to come.
Specifications
- Brand: Seiko
- Collection: Presage
- Reference Number: SSA425J1
- Case Shape: Round
- Case Diameter: 40.5mm
- Case Material: Stainless Steel
- Dial Colour: Black
- Bezel: Bi-directional black bezel with rose-gold accents
- Crystal: Box-shaped Hardlex
- Movement: Automatic (Calibre 4R39)
- Movement Features: Manual winding capability, open-heart display
- Jewels: 24
- Power Reserve: Approximately 41 hours
- Frequency: 21,600 vibrations per hour
- Functions: Hours, minutes, seconds, 24-hour subdial
- Band Material: Stainless Steel (three-link bracelet)
- Bracelet Length: 200mm
- Clasp Type: Fold-over clasp
- Water Resistance: 50m (5 bar)
- Case Back: See-through screw-down case back
- Weight: 140g
- Gender: Men's
FAQ
Q: What is an open-heart complication and why is it desirable?
A: An open-heart watch features a dial aperture that reveals part of the movement, typically the balance wheel and escapement. It allows the wearer to appreciate the mechanical craftsmanship at work, adding visual interest and a tangible connection to the art of traditional watchmaking without requiring a full skeleton dial.
Q: Does the 4R39 movement require manual winding, or is it fully automatic?
A: The Seiko 4R39 calibre is a self-winding automatic movement that winds itself through the motion of your wrist throughout the day. It also features manual winding capability via the crown, allowing you to top up the power reserve if the watch has been off the wrist for an extended period.
Q: Is the SSA425J1 suitable for swimming or water sports?
A: With 50 metres of water resistance, this watch can withstand splashes, rain, and brief immersion such as handwashing or shallow swimming. However, it is not rated for diving, snorkelling, or high-impact water activities. For such pursuits, consider a diver's watch with at least 200m water resistance.
Q: What is the advantage of a Hardlex crystal over mineral glass?
A: Hardlex is Seiko's proprietary hardened mineral crystal, offering superior scratch resistance compared to standard mineral glass while remaining more shatter-resistant than sapphire. The box-shaped profile on this model adds a vintage aesthetic and improved legibility from various angles.
Q: Can I see the movement through both the dial and the case back?
A: Yes. The dial features an open-heart aperture at 7 o'clock that reveals the balance wheel and escapement in motion, while the transparent screw-down case back offers a full view of the decorated rotor, bridges, and movement architecture from the rear.
Q: How often should an automatic watch like the SSA425J1 be serviced?
A: Seiko recommends a complete service every three to five years, depending on usage and environmental conditions. Regular servicing by a qualified watchmaker ensures the movement remains lubricated, accurate, and protected against premature wear. Our servicing team can assist with maintenance scheduling and any adjustments required.
Q: Does the bi-directional bezel serve a functional purpose?
A: While inspired by the rotating bezels found on vintage dive and pilot's watches, the bezel on the SSA425J1 is primarily an aesthetic design element that reinforces the 1960s sports-watch character. It can be used informally to track elapsed time, though it lacks the locking mechanism and luminous markings of a true tool watch.
Warranty
- This watch is covered by a 3-year international Seiko warranty from the date of purchase, valid when bought from an authorised retailer such as Cassims & Co.
- The warranty covers defects in materials and workmanship under normal use, including movement malfunctions attributable to manufacturing faults.
- The warranty does not cover normal wear and tear, including scratches, dents, or discolouration of the case, bracelet, or crystal.
- Battery replacement, routine servicing, and strap or bracelet adjustments are not covered under warranty.
- Water damage resulting from improper use, failure to ensure the crown is secured, or use beyond the watch's stated water resistance rating is excluded.
- Damage caused by accidents, misuse, unauthorised repairs, or servicing by non-authorised technicians voids the warranty.
- To make a warranty claim, retain your original proof of purchase and contact Cassims & Co. or any authorised Seiko service centre. We will facilitate warranty service directly with Seiko on your behalf.
Care Guide
- Avoid exposing your watch to extreme temperatures, strong magnetic fields, or harsh chemicals, as these can affect timekeeping accuracy and damage seals.
- If the watch comes into contact with saltwater, rinse it gently under fresh water and dry thoroughly to prevent corrosion of the bracelet and case.
- Do not operate the crown or pushers while the watch is wet or submerged, as this can compromise water resistance and allow moisture ingress.
- Clean the stainless steel case and bracelet periodically with a soft, damp cloth. For deeper cleaning, use a soft brush with mild soapy water, rinse, and dry completely.
- Although Hardlex crystal is highly scratch-resistant, avoid impact against hard surfaces such as concrete, metal, or stone to preserve clarity.
- If the watch is not worn daily, wind it manually via the crown every few days to maintain lubrication within the movement and ensure optimal performance.
- Store your watch in a cool, dry place away from direct sunlight when not in use. A watch box or padded pouch offers additional protection against dust and accidental knocks.
- Have the water resistance seals and gaskets inspected during routine servicing, particularly if you regularly expose the watch to moisture.