Citizen Tsuyosa Automatic vs Casio F-91W
Two timepieces compared — $250–$500 vs Under $50
Quick Verdict
The Casio F-91W (Under $50) delivers Casio Digital Quartz (Battery) technology in the tier below the Citizen Tsuyosa Automatic ($250–$500). The F-91W measures 35mm and is rated 30m (Splash Resistant). The Tsuyosa Automatic justifies its premium with Made in Japan heritage and Automatic Caliber 8210. Both represent excellent choices in the timepiece category.
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Specifications Compared
| Feature | Citizen Tsuyosa Automatic | Casio F-91W |
|---|---|---|
| Price | $250–$500 | Under $50 |
| Case Size | 40mm | 35mm |
| Movement | Automatic Caliber 8210 | Quartz Module 593 |
| Caliber Type | Citizen/Miyota In-House Automatic | Casio Digital Quartz (Battery) |
| Power Reserve | 40 Hours | 7-Year Battery |
| Water Resistance | 50m (5 ATM) | 30m (Splash Resistant) |
| Crystal | Sapphire Crystal with Cyclops | Acrylic |
| Case Material | Stainless Steel | Resin |
| Origin | Made in Japan | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Casio's approach
The Citizen Tsuyosa Automatic features a Stainless Steel case at 40mm with Sapphire Crystal with Cyclops 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 Caliber 8210 vs Quartz Module 593
The Tsuyosa Automatic runs the Automatic Caliber 8210 (Citizen/Miyota In-House Automatic, 40 Hours power reserve) at 21,600 vph (3 Hz) frequency. The F-91W uses the Quartz Module 593 (Casio Digital Quartz (Battery), 7-Year Battery reserve) at standard. The Tsuyosa Automatic edges ahead on power reserve.
Wearability & Fit
40mm vs 35mm — different wrist presence
At 40mm, the Tsuyosa Automatic has a bolder wrist presence compared to the F-91W at 35mm. Water resistance differs: 50m (5 ATM) vs 30m (Splash Resistant).
Value & Cost of Ownership
Casio sits in the lower tier
The Citizen Tsuyosa Automatic sits at $250–$500 and the Casio F-91W at Under $50. On the specs that outlast any price: the Tsuyosa Automatic uses Sapphire Crystal with Cyclops with 40 Hours, against Acrylic and 7-Year Battery on the F-91W. Service intervals are typically 5-7 years for both.
Water Resistance
50m (5 ATM) vs 30m (Splash Resistant)
The Tsuyosa Automatic is rated to 50m (5 ATM) while the F-91W handles 30m (Splash Resistant). The Tsuyosa Automatic is better suited for water activities.
Our Verdict
Citizen
Tsuyosa Automatic
Choose the Citizen Tsuyosa Automatic if you prioritize Citizen/Miyota In-House Automatic engineering, Made in Japan craftsmanship, and 50m (5 ATM) water resistance. At $250–$500, it delivers Automatic Caliber 8210 with 40 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 Citizen Tsuyosa Automatic and Casio F-91W represent two distinct approaches to the timepiece category — the Citizen bringing Made in Japan 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.