Tudor Black Bay 58 vs Seiko Presage SSA425 Open Heart
Tudor's diver meets Seiko's timepiece
Quick Verdict
The Seiko Presage SSA425 Open Heart ($250–$500) delivers Seiko In-House Automatic technology in the tier below the Tudor Black Bay 58 ($2,500–$5,000). The Presage SSA425 Open Heart measures 40.5mm and is rated 50m (5 ATM). The Black Bay 58 justifies its premium with Swiss Made heritage and Automatic Manufacture Calibre MT5402. Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Tudor Black Bay 58 | Seiko Presage SSA425 Open Heart |
|---|---|---|
| Price | $2,500–$5,000 | $250–$500 |
| Case Size | 39mm | 40.5mm |
| Movement | Automatic Manufacture Calibre MT5402 | Automatic Caliber 4R38 |
| Caliber Type | In-House Automatic Manufacture (Kenissi) | Seiko In-House Automatic |
| Power Reserve | 70 Hours | 41 Hours |
| Water Resistance | 200m (20 ATM) | 50m (5 ATM) |
| Crystal | Domed Sapphire | Hardlex Crystal |
| Case Material | 316L Stainless Steel | Stainless Steel |
| Origin | Swiss Made | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Tudor's design language vs Seiko's approach
The Tudor Black Bay 58 features a 316L Stainless Steel case at 39mm with Domed Sapphire protection. The Seiko Presage SSA425 Open Heart offers Stainless Steel construction at 40.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Manufacture Calibre MT5402 vs Automatic Caliber 4R38
The Black Bay 58 runs the Automatic Manufacture Calibre MT5402 (In-House Automatic Manufacture (Kenissi), 70 Hours power reserve) at 28,800 vph (4 Hz) frequency. The Presage SSA425 Open Heart uses the Automatic Caliber 4R38 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The Black Bay 58 edges ahead on power reserve.
Wearability & Fit
39mm vs 40.5mm — different wrist presence
At 39mm, the Black Bay 58 wears more compactly on smaller wrists compared to the Presage SSA425 Open Heart at 40.5mm. Water resistance differs: 200m (20 ATM) vs 50m (5 ATM).
Value & Cost of Ownership
Seiko sits in the lower tier
The Tudor Black Bay 58 sits at $2,500–$5,000 and the Seiko Presage SSA425 Open Heart at $250–$500. On the specs that outlast any price: the Black Bay 58 uses Domed Sapphire with 70 Hours, against Hardlex Crystal and 41 Hours on the Presage SSA425 Open Heart. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 50m (5 ATM)
The Black Bay 58 is rated to 200m (20 ATM) while the Presage SSA425 Open Heart handles 50m (5 ATM). The Black Bay 58 is better suited for water activities.
Our Verdict
Tudor
Black Bay 58
Choose the Tudor Black Bay 58 if you prioritize In-House Automatic Manufacture (Kenissi) engineering, Swiss Made craftsmanship, and 200m (20 ATM) water resistance. At $2,500–$5,000, it delivers Automatic Manufacture Calibre MT5402 with 70 Hours power reserve.
Check Price on AmazonSeiko
Presage SSA425 Open Heart
Choose the Seiko Presage SSA425 Open Heart if you value Seiko In-House Automatic technology, Made in Japan heritage, and 40.5mm proportions. At $250–$500, the Automatic Caliber 4R38 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tudor Black Bay 58 and Seiko Presage SSA425 Open Heart represent two distinct approaches to fine watchmaking — the Tudor bringing Swiss Made tradition while Seiko delivers Made in Japan 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.