Casio Pro Trek PRG270-1 vs Citizen Tsuyosa Automatic (Green Dial)
Two timepieces compared — $150–$250 vs $250–$500
Quick Verdict
The Casio Pro Trek PRG270-1 ($150–$250) offers Tough Solar Quartz (No Battery Change) precision in the tier below the Citizen Tsuyosa Automatic (Green Dial) ($250–$500). The Pro Trek PRG270-1 measures 54.6 × 52.4 × 15mm and is rated 100m (10 ATM). The Tsuyosa Automatic (Green Dial) counters with Made in Japan craftsmanship and 50m (5 ATM) water resistance. Both are exceptional timepieces for their respective tiers.
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Specifications Compared
| Feature | Casio Pro Trek PRG270-1 | Citizen Tsuyosa Automatic (Green Dial) |
|---|---|---|
| Price | $150–$250 | $250–$500 |
| Case Size | 54.6 × 52.4 × 15mm | 40mm |
| Movement | Tough Solar (Solar Quartz) | Automatic Caliber 8210 |
| Caliber Type | Tough Solar Quartz (No Battery Change) | Citizen/Miyota In-House Automatic |
| Power Reserve | Tough Solar (Rechargeable) | 40 Hours |
| Water Resistance | 100m (10 ATM) | 50m (5 ATM) |
| Crystal | Mineral Glass | Sapphire Crystal with Cyclops |
| Case Material | Resin | Stainless Steel |
| Origin | Casio (Japan) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Citizen's approach
The Casio Pro Trek PRG270-1 features a Resin case at 54.6 × 52.4 × 15mm with Mineral Glass protection. The Citizen Tsuyosa Automatic (Green Dial) offers Stainless Steel construction at 40mm with Sapphire Crystal with Cyclops. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Tough Solar (Solar Quartz) vs Automatic Caliber 8210
The Pro Trek PRG270-1 runs the Tough Solar (Solar Quartz) (Tough Solar Quartz (No Battery Change), Tough Solar (Rechargeable) power reserve) at standard frequency. The Tsuyosa Automatic (Green Dial) uses the Automatic Caliber 8210 (Citizen/Miyota In-House Automatic, 40 Hours reserve) at 21,600 vph (3 Hz). The Tsuyosa Automatic (Green Dial) offers a longer power reserve.
Wearability & Fit
54.6 × 52.4 × 15mm vs 40mm — different wrist presence
At 54.6 × 52.4 × 15mm, the Pro Trek PRG270-1 has a bolder wrist presence compared to the Tsuyosa Automatic (Green Dial) at 40mm. Water resistance differs: 100m (10 ATM) vs 50m (5 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio Pro Trek PRG270-1 sits at $150–$250 and the Citizen Tsuyosa Automatic (Green Dial) at $250–$500. On the specs that outlast any price: the Pro Trek PRG270-1 uses Mineral Glass with Tough Solar (Rechargeable), against Sapphire Crystal with Cyclops and 40 Hours on the Tsuyosa Automatic (Green Dial). Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 50m (5 ATM)
The Pro Trek PRG270-1 is rated to 100m (10 ATM) while the Tsuyosa Automatic (Green Dial) handles 50m (5 ATM). The Pro Trek PRG270-1 is better suited for water activities.
Our Verdict
Casio
Pro Trek PRG270-1
Choose the Casio Pro Trek PRG270-1 if you prioritize Tough Solar Quartz (No Battery Change) engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $150–$250, it delivers Tough Solar (Solar Quartz) with Tough Solar (Rechargeable) power reserve.
Check Price on AmazonCitizen
Tsuyosa Automatic (Green Dial)
Choose the Citizen Tsuyosa Automatic (Green Dial) if you value Citizen/Miyota In-House Automatic technology, Made in Japan heritage, and 40mm proportions. At $250–$500, the Automatic Caliber 8210 with 40 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio Pro Trek PRG270-1 and Citizen Tsuyosa Automatic (Green Dial) represent two distinct approaches to the timepiece category — the Casio bringing Casio (Japan) tradition while Citizen delivers Made in 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.