Casio F-91W vs Citizen Eco-Drive Weekender Chronograph
Casio's timepiece meets Citizen's chronograph
Quick Verdict
The Casio F-91W (Under $50) offers Casio Digital Quartz (Battery) precision in the tier below the Citizen Eco-Drive Weekender Chronograph ($150–$250). The F-91W measures 35mm and is rated 30m (Splash Resistant). The Eco-Drive Weekender Chronograph counters with Japanese Movement craftsmanship and 100m (10 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Casio F-91W | Citizen Eco-Drive Weekender Chronograph |
|---|---|---|
| Price | Under $50 | $150–$250 |
| Case Size | 35mm | 43mm |
| Movement | Quartz Module 593 | Eco-Drive Caliber H500 |
| Caliber Type | Casio Digital Quartz (Battery) | Citizen Eco-Drive Solar Quartz |
| Power Reserve | 7-Year Battery | — |
| Water Resistance | 30m (Splash Resistant) | 100m (10 ATM) |
| Crystal | Acrylic | Mineral Crystal |
| Case Material | Resin | Stainless Steel |
| Origin | Casio (Japan) | Japanese Movement |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Citizen's approach
The Casio F-91W features a Resin case at 35mm with Acrylic protection. The Citizen Eco-Drive Weekender Chronograph offers Stainless Steel construction at 43mm with Mineral Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 593 vs Eco-Drive Caliber H500
The F-91W runs the Quartz Module 593 (Casio Digital Quartz (Battery), 7-Year Battery power reserve) at standard frequency. The Eco-Drive Weekender Chronograph uses the Eco-Drive Caliber H500 (Citizen Eco-Drive Solar Quartz, standard reserve) at standard. The F-91W edges ahead on power reserve.
Wearability & Fit
35mm vs 43mm — different wrist presence
At 35mm, the F-91W wears more compactly on smaller wrists compared to the Eco-Drive Weekender Chronograph at 43mm. 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 Citizen Eco-Drive Weekender Chronograph at $150–$250. On the specs that outlast any price: the F-91W uses Acrylic with 7-Year Battery, against Mineral Crystal and a standard reserve on the Eco-Drive Weekender Chronograph. 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 Eco-Drive Weekender Chronograph handles 100m (10 ATM). The Eco-Drive Weekender Chronograph 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 AmazonCitizen
Eco-Drive Weekender Chronograph
Choose the Citizen Eco-Drive Weekender Chronograph if you value Citizen Eco-Drive Solar Quartz technology, Japanese Movement heritage, and 43mm proportions. At $150–$250, the Eco-Drive Caliber H500 with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio F-91W and Citizen Eco-Drive Weekender Chronograph represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Citizen 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.