Citizen Tsuyosa Automatic vs Casio Pro Trek PRG340-1
Two timepieces compared — $250–$500 vs $150–$250
Quick Verdict
The Casio Pro Trek PRG340-1 ($150–$250) delivers Tough Solar Quartz (No Battery Change) technology in the tier below the Citizen Tsuyosa Automatic ($250–$500). The Pro Trek PRG340-1 measures 54.7 × 51.7 × 15.1mm and is rated 100m (10 ATM). 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 Pro Trek PRG340-1 |
|---|---|---|
| Price | $250–$500 | $150–$250 |
| Case Size | 40mm | 54.7 × 51.7 × 15.1mm |
| Movement | Automatic Caliber 8210 | Tough Solar (Solar Quartz) |
| Caliber Type | Citizen/Miyota In-House Automatic | Tough Solar Quartz (No Battery Change) |
| Power Reserve | 40 Hours | Tough Solar (Rechargeable) |
| Water Resistance | 50m (5 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal with Cyclops | Mineral Glass |
| Case Material | Stainless Steel | Bio-Based 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 Pro Trek PRG340-1 offers Bio-Based Resin construction at 54.7 × 51.7 × 15.1mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 8210 vs Tough Solar (Solar Quartz)
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 Pro Trek PRG340-1 uses the Tough Solar (Solar Quartz) (Tough Solar Quartz (No Battery Change), Tough Solar (Rechargeable) reserve) at standard. The Tsuyosa Automatic edges ahead on power reserve.
Wearability & Fit
40mm vs 54.7 × 51.7 × 15.1mm — different wrist presence
At 40mm, the Tsuyosa Automatic wears more compactly on smaller wrists compared to the Pro Trek PRG340-1 at 54.7 × 51.7 × 15.1mm. Water resistance differs: 50m (5 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Citizen Tsuyosa Automatic sits at $250–$500 and the Casio Pro Trek PRG340-1 at $150–$250. On the specs that outlast any price: the Tsuyosa Automatic uses Sapphire Crystal with Cyclops with 40 Hours, against Mineral Glass and Tough Solar (Rechargeable) on the Pro Trek PRG340-1. Service intervals are typically 5-7 years for both.
Water Resistance
50m (5 ATM) vs 100m (10 ATM)
The Tsuyosa Automatic is rated to 50m (5 ATM) while the Pro Trek PRG340-1 handles 100m (10 ATM). The Pro Trek PRG340-1 offers superior water resistance.
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
Pro Trek PRG340-1
Choose the Casio Pro Trek PRG340-1 if you value Tough Solar Quartz (No Battery Change) technology, Casio (Japan) heritage, and 54.7 × 51.7 × 15.1mm proportions. At $150–$250, the Tough Solar (Solar Quartz) with Tough Solar (Rechargeable) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Tsuyosa Automatic and Casio Pro Trek PRG340-1 represent two distinct approaches to the timepiece category — the Citizen bringing Made in Japan tradition while Casio delivers Casio (Japan) 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.