Casio F-91W vs Tag Heuer Aquaracer Professional 300
Casio's timepiece meets Tag Heuer's diver
Quick Verdict
The Casio F-91W (Under $50) offers Casio Digital Quartz (Battery) precision in the tier below the Tag Heuer Aquaracer Professional 300 ($2,500–$5,000). The F-91W measures 35mm and is rated 30m (Splash Resistant). The Aquaracer Professional 300 counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Casio F-91W | Tag Heuer Aquaracer Professional 300 |
|---|---|---|
| Price | Under $50 | $2,500–$5,000 |
| Case Size | 35mm | 43mm |
| Movement | Quartz Module 593 | Automatic Caliber 5 |
| Caliber Type | Casio Digital Quartz (Battery) | Automatic (ETA 2824-2 / Sellita SW200 base) |
| Power Reserve | 7-Year Battery | 38 Hours |
| Water Resistance | 30m (Splash Resistant) | 300m (30 ATM) |
| Crystal | Acrylic | Sapphire with Anti-Reflective Coating |
| Case Material | Resin | Stainless Steel |
| Origin | Casio (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Tag Heuer's approach
The Casio F-91W features a Resin case at 35mm with Acrylic protection. The Tag Heuer Aquaracer Professional 300 offers Stainless Steel construction at 43mm with Sapphire with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 593 vs Automatic Caliber 5
The F-91W runs the Quartz Module 593 (Casio Digital Quartz (Battery), 7-Year Battery power reserve) at standard frequency. The Aquaracer Professional 300 uses the Automatic Caliber 5 (Automatic (ETA 2824-2 / Sellita SW200 base), 38 Hours reserve) at 28,800 vph (4 Hz). The Aquaracer Professional 300 offers a longer power reserve.
Wearability & Fit
35mm vs 43mm — different wrist presence
At 35mm, the F-91W wears more compactly on smaller wrists compared to the Aquaracer Professional 300 at 43mm. Water resistance differs: 30m (Splash Resistant) vs 300m (30 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio F-91W sits at Under $50 and the Tag Heuer Aquaracer Professional 300 at $2,500–$5,000. On the specs that outlast any price: the F-91W uses Acrylic with 7-Year Battery, against Sapphire with Anti-Reflective Coating and 38 Hours on the Aquaracer Professional 300. Service intervals are typically 5-7 years for both.
Water Resistance
30m (Splash Resistant) vs 300m (30 ATM)
The F-91W is rated to 30m (Splash Resistant) while the Aquaracer Professional 300 handles 300m (30 ATM). The Aquaracer Professional 300 offers superior water resistance.
Our Verdict
Casio
F-91W
Choose the Casio F-91W if you prioritize Casio Digital Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 30m (Splash Resistant) water resistance. At Under $50, it delivers Quartz Module 593 with 7-Year Battery power reserve.
Check Price on AmazonTag Heuer
Aquaracer Professional 300
Choose the Tag Heuer Aquaracer Professional 300 if you value Automatic (ETA 2824-2 / Sellita SW200 base) technology, Swiss Made heritage, and 43mm proportions. At $2,500–$5,000, the Automatic Caliber 5 with 38 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio F-91W and Tag Heuer Aquaracer Professional 300 represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Tag Heuer 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.