Tudor Black Bay 58 vs Casio F-91W
Tudor's diver meets Casio's timepiece
Quick Verdict
The Casio F-91W (Under $50) delivers Casio Digital Quartz (Battery) technology in the tier below the Tudor Black Bay 58 ($2,500–$5,000). The F-91W measures 35mm and is rated 30m (Splash Resistant). 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 | Casio F-91W |
|---|---|---|
| Price | $2,500–$5,000 | Under $50 |
| Case Size | 39mm | 35mm |
| Movement | Automatic Manufacture Calibre MT5402 | Quartz Module 593 |
| Caliber Type | In-House Automatic Manufacture (Kenissi) | Casio Digital Quartz (Battery) |
| Power Reserve | 70 Hours | 7-Year Battery |
| Water Resistance | 200m (20 ATM) | 30m (Splash Resistant) |
| Crystal | Domed Sapphire | Acrylic |
| Case Material | 316L Stainless Steel | Resin |
| Origin | Swiss Made | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Tudor's design language vs Casio's approach
The Tudor Black Bay 58 features a 316L Stainless Steel case at 39mm with Domed Sapphire protection. The Casio F-91W offers Resin construction at 35mm with Acrylic. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Manufacture Calibre MT5402 vs Quartz Module 593
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 F-91W uses the Quartz Module 593 (Casio Digital Quartz (Battery), 7-Year Battery reserve) at standard. The Black Bay 58 edges ahead on power reserve.
Wearability & Fit
39mm vs 35mm — different wrist presence
At 39mm, the Black Bay 58 has a bolder wrist presence compared to the F-91W at 35mm. Water resistance differs: 200m (20 ATM) vs 30m (Splash Resistant).
Value & Cost of Ownership
Casio sits in the lower tier
The Tudor Black Bay 58 sits at $2,500–$5,000 and the Casio F-91W at Under $50. On the specs that outlast any price: the Black Bay 58 uses Domed Sapphire with 70 Hours, against Acrylic and 7-Year Battery on the F-91W. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 30m (Splash Resistant)
The Black Bay 58 is rated to 200m (20 ATM) while the F-91W handles 30m (Splash Resistant). 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 AmazonCasio
F-91W
Choose the Casio F-91W if you value Casio Digital Quartz (Battery) technology, Casio (Japan) heritage, and 35mm proportions. At Under $50, the Quartz Module 593 with 7-Year Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tudor Black Bay 58 and Casio F-91W represent two distinct approaches to fine watchmaking — the Tudor bringing Swiss Made tradition while Casio delivers Casio (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.