Updated
Seiko Presage SSA425 Open Heart vs Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box)
Two timepieces compared — $250–$500 vs $10,000–$25,000
Quick Verdict
The Seiko Presage SSA425 Open Heart ($250–$500) offers Seiko In-House Automatic precision in the tier below the Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) ($10,000–$25,000). The Presage SSA425 Open Heart measures 40.5mm and is rated 50m (5 ATM). The Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) counters with Swiss Made craftsmanship and 100m (10 ATM) water resistance. Both are exceptional timepieces for their respective tiers.
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Rolex
Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box)
$10,000–$25,000
Specifications Compared
| Feature | Seiko Presage SSA425 Open Heart | Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) |
|---|---|---|
| Price | $250–$500 | $10,000–$25,000 |
| Case Size | 40.5mm | 26mm |
| Movement | Automatic Caliber 4R38 | Automatic, Rolex calibre 2135, quickset date |
| Caliber Type | Seiko In-House Automatic | Rolex 2135, chronometer certified |
| Power Reserve | 41 Hours | About 42 hours |
| Water Resistance | 50m (5 ATM) | 100m (10 ATM) |
| Crystal | Hardlex Crystal | Sapphire Crystal, Cyclops |
| Case Material | Stainless Steel | 18k white gold (69179), 18k yellow gold fluted bezel |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Seiko's design language vs Rolex's approach
The Seiko Presage SSA425 Open Heart features a Stainless Steel case at 40.5mm with Hardlex Crystal protection. The Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) offers 18k white gold (69179), 18k yellow gold fluted bezel construction at 26mm with Sapphire Crystal, Cyclops. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 4R38 vs Automatic, Rolex calibre 2135, quickset date
The Presage SSA425 Open Heart runs the Automatic Caliber 4R38 (Seiko In-House Automatic, 41 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) uses the Automatic, Rolex calibre 2135, quickset date (Rolex 2135, chronometer certified, About 42 hours reserve) at standard. The Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) offers a longer power reserve.
Wearability & Fit
40.5mm vs 26mm — different wrist presence
At 40.5mm, the Presage SSA425 Open Heart has a bolder wrist presence compared to the Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) at 26mm. Water resistance differs: 50m (5 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Seiko sits in the lower tier
The Seiko Presage SSA425 Open Heart sits at $250–$500 and the Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) at $10,000–$25,000. On the specs that outlast any price: the Presage SSA425 Open Heart uses Hardlex Crystal with 41 Hours, against Sapphire Crystal, Cyclops and About 42 hours on the Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box). Service intervals are typically 5-7 years for both.
Water Resistance
50m (5 ATM) vs 100m (10 ATM)
The Presage SSA425 Open Heart is rated to 50m (5 ATM) while the Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) handles 100m (10 ATM). The Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) offers superior water resistance.
Our Verdict
Seiko
Presage SSA425 Open Heart
Choose the Seiko Presage SSA425 Open Heart if you prioritize Seiko In-House Automatic engineering, Made in Japan craftsmanship, and 50m (5 ATM) water resistance. At $250–$500, it delivers Automatic Caliber 4R38 with 41 Hours power reserve.
Check Price on AmazonRolex
Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box)
Choose the Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) if you value Rolex 2135, chronometer certified technology, Swiss Made heritage, and 26mm proportions. At $10,000–$25,000, the Automatic, Rolex calibre 2135, quickset date with About 42 hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Seiko Presage SSA425 Open Heart and Rolex Lady-Datejust 26 69179 (white gold, yellow gold bezel, Jurassic fossil dial, Tridor President, box) represent two distinct approaches to the timepiece category — the Seiko bringing Made in Japan tradition while Rolex delivers Swiss Made engineering.
Frequently Asked Questions
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How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.