Tudor Black Bay 58 vs Bulova Classic Automatic 98A139
Tudor's diver meets Bulova's timepiece
Quick Verdict
The Bulova Classic Automatic 98A139 ($250–$500) delivers Self-Winding Automatic technology in the tier below the Tudor Black Bay 58 ($2,500–$5,000). The Classic Automatic 98A139 measures 45mm and is rated 30m (3 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 | Bulova Classic Automatic 98A139 |
|---|---|---|
| Price | $2,500–$5,000 | $250–$500 |
| Case Size | 39mm | 45mm |
| Movement | Automatic Manufacture Calibre MT5402 | Automatic, 21 Jewels |
| Caliber Type | In-House Automatic Manufacture (Kenissi) | Self-Winding Automatic |
| Power Reserve | 70 Hours | — |
| Water Resistance | 200m (20 ATM) | 30m (3 ATM) |
| Crystal | Domed Sapphire | Domed Crystal |
| Case Material | 316L Stainless Steel | Black Ion-Plated Stainless Steel |
| Origin | Swiss Made | Japanese Movement |
Category-by-Category Analysis
Design & Aesthetics
Tudor's design language vs Bulova's approach
The Tudor Black Bay 58 features a 316L Stainless Steel case at 39mm with Domed Sapphire protection. The Bulova Classic Automatic 98A139 offers Black Ion-Plated Stainless Steel construction at 45mm with Domed Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Manufacture Calibre MT5402 vs Automatic, 21 Jewels
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 Classic Automatic 98A139 uses the Automatic, 21 Jewels (Self-Winding Automatic, standard reserve) at standard. The Black Bay 58 edges ahead on power reserve.
Wearability & Fit
39mm vs 45mm — different wrist presence
At 39mm, the Black Bay 58 wears more compactly on smaller wrists compared to the Classic Automatic 98A139 at 45mm. Water resistance differs: 200m (20 ATM) vs 30m (3 ATM).
Value & Cost of Ownership
Bulova sits in the lower tier
The Tudor Black Bay 58 sits at $2,500–$5,000 and the Bulova Classic Automatic 98A139 at $250–$500. On the specs that outlast any price: the Black Bay 58 uses Domed Sapphire with 70 Hours, against Domed Crystal and a standard reserve on the Classic Automatic 98A139. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 30m (3 ATM)
The Black Bay 58 is rated to 200m (20 ATM) while the Classic Automatic 98A139 handles 30m (3 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 AmazonBulova
Classic Automatic 98A139
Choose the Bulova Classic Automatic 98A139 if you value Self-Winding Automatic technology, Japanese Movement heritage, and 45mm proportions. At $250–$500, the Automatic, 21 Jewels with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tudor Black Bay 58 and Bulova Classic Automatic 98A139 represent two distinct approaches to fine watchmaking — the Tudor bringing Swiss Made tradition while Bulova delivers Japanese Movement 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.