Casio F-91W vs Tissot PRX Powermatic 80 35mm
Two timepieces compared — Under $50 vs $500–$1,000
Quick Verdict
The Casio F-91W (Under $50) offers Casio Digital Quartz (Battery) precision in the tier below the Tissot PRX Powermatic 80 35mm ($500–$1,000). The F-91W measures 35mm and is rated 30m (Splash Resistant). The PRX Powermatic 80 35mm counters with Swiss Made craftsmanship and 100m (10 ATM) water resistance. Both are exceptional timepieces for their respective tiers.
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Specifications Compared
| Feature | Casio F-91W | Tissot PRX Powermatic 80 35mm |
|---|---|---|
| Price | Under $50 | $500–$1,000 |
| Case Size | 35mm | 35mm |
| Movement | Quartz Module 593 | Automatic Powermatic 80 (Caliber 80.111) |
| Caliber Type | Casio Digital Quartz (Battery) | ETA/Tissot Automatic |
| Power Reserve | 7-Year Battery | 80 Hours |
| Water Resistance | 30m (Splash Resistant) | 100m (10 ATM) |
| Crystal | Acrylic | Sapphire Crystal |
| Case Material | Resin | Stainless Steel |
| Origin | Casio (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Tissot's approach
The Casio F-91W features a Resin case at 35mm with Acrylic protection. The Tissot PRX Powermatic 80 35mm offers Stainless Steel construction at 35mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 593 vs Automatic Powermatic 80 (Caliber 80.111)
The F-91W runs the Quartz Module 593 (Casio Digital Quartz (Battery), 7-Year Battery power reserve) at standard frequency. The PRX Powermatic 80 35mm uses the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours reserve) at 21,600 vph (3 Hz). The PRX Powermatic 80 35mm offers a longer power reserve.
Wearability & Fit
35mm vs 35mm — different wrist presence
At 35mm, the F-91W is similarly sized compared to the PRX Powermatic 80 35mm at 35mm. Water resistance differs: 30m (Splash Resistant) vs 100m (10 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio F-91W sits at Under $50 and the Tissot PRX Powermatic 80 35mm at $500–$1,000. On the specs that outlast any price: the F-91W uses Acrylic with 7-Year Battery, against Sapphire Crystal and 80 Hours on the PRX Powermatic 80 35mm. Service intervals are typically 5-7 years for both.
Water Resistance
30m (Splash Resistant) vs 100m (10 ATM)
The F-91W is rated to 30m (Splash Resistant) while the PRX Powermatic 80 35mm handles 100m (10 ATM). The PRX Powermatic 80 35mm 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 AmazonTissot
PRX Powermatic 80 35mm
Choose the Tissot PRX Powermatic 80 35mm if you value ETA/Tissot Automatic technology, Swiss Made heritage, and 35mm proportions. At $500–$1,000, the Automatic Powermatic 80 (Caliber 80.111) with 80 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio F-91W and Tissot PRX Powermatic 80 35mm represent two distinct approaches to the timepiece category — the Casio bringing Casio (Japan) tradition while Tissot delivers Swiss Made engineering.
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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.