Head-to-Head Comparison

Updated September 5, 2026

Casio Pro Trek PRW-B1000-1 vs Citizen Tsuyosa Automatic (Green Dial)

Two timepieces compared — $500–$1,000 vs $250–$500

Quick Verdict

The Citizen Tsuyosa Automatic (Green Dial) ($250–$500) delivers Citizen/Miyota In-House Automatic technology in the tier below the Casio Pro Trek PRW-B1000-1 ($500–$1,000). The Tsuyosa Automatic (Green Dial) measures 40mm and is rated 50m (5 ATM). The Pro Trek PRW-B1000-1 justifies its premium with Casio (Japan) heritage and Tough Solar (Solar Quartz), Radio-Controlled. Both represent excellent choices in the timepiece category.

CasioPro Trek PRW-B1000-1$500–$1,000 Check price CitizenTsuyosa Automatic (Green Dial)$250–$500 Check price

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Casio

Pro Trek PRW-B1000-1

$500–$1,000

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Citizen

Tsuyosa Automatic (Green Dial)

$250–$500

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Specifications Compared

Feature	Casio Pro Trek PRW-B1000-1	Citizen Tsuyosa Automatic (Green Dial)
Price	$500–$1,000	$250–$500
Case Size	50.8 × 45.8 × 14.9mm	40mm
Movement	Tough Solar (Solar Quartz), Radio-Controlled	Automatic Caliber 8210
Caliber Type	Tough Solar Quartz, Multi-Band 6 + Bluetooth	Citizen/Miyota In-House Automatic
Power Reserve	Tough Solar (Rechargeable)	40 Hours
Water Resistance	100m (10 ATM)	50m (5 ATM)
Crystal	Sapphire with Anti-Reflective Coating	Sapphire Crystal with Cyclops
Case Material	Bio-Based Resin / Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Made in Japan

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Casio's design language vs Citizen's approach

The Casio Pro Trek PRW-B1000-1 features a Bio-Based Resin / Stainless Steel case at 50.8 × 45.8 × 14.9mm with Sapphire with Anti-Reflective Coating 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

Edge: Citizen

Tough Solar (Solar Quartz), Radio-Controlled vs Automatic Caliber 8210

The Pro Trek PRW-B1000-1 runs the Tough Solar (Solar Quartz), Radio-Controlled (Tough Solar Quartz, Multi-Band 6 + Bluetooth, 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

Edge: Citizen

50.8 × 45.8 × 14.9mm vs 40mm — different wrist presence

At 50.8 × 45.8 × 14.9mm, the Pro Trek PRW-B1000-1 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

Edge: Citizen

Citizen sits in the lower tier

The Casio Pro Trek PRW-B1000-1 sits at $500–$1,000 and the Citizen Tsuyosa Automatic (Green Dial) at $250–$500. On the specs that outlast any price: the Pro Trek PRW-B1000-1 uses Sapphire with Anti-Reflective Coating 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

Edge: Casio

100m (10 ATM) vs 50m (5 ATM)

The Pro Trek PRW-B1000-1 is rated to 100m (10 ATM) while the Tsuyosa Automatic (Green Dial) handles 50m (5 ATM). The Pro Trek PRW-B1000-1 is better suited for water activities.

Our Verdict

Casio

Pro Trek PRW-B1000-1

Choose the Casio Pro Trek PRW-B1000-1 if you prioritize Tough Solar Quartz, Multi-Band 6 + Bluetooth engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Tough Solar (Solar Quartz), Radio-Controlled with Tough Solar (Rechargeable) power reserve.

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Citizen

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.

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The Bottom Line

The Casio Pro Trek PRW-B1000-1 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

The Citizen Tsuyosa Automatic (Green Dial) is the better buy if you want a mechanical movement; the Casio Pro Trek PRW-B1000-1 is the better buy if you want solar power and quartz accuracy with no servicing. For water, the Casio Pro Trek PRW-B1000-1 is rated 100 m against 50 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Citizen Tsuyosa Automatic (Green Dial) sits a band lower ($250–$500 against $500–$1,000), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Citizen Tsuyosa Automatic (Green Dial) offers better upfront value, sitting a tier lower at $250–$500. However, the Casio Pro Trek PRW-B1000-1 may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Pro Trek PRW-B1000-1 at 50.8 × 45.8 × 14.9mm with 100m (10 ATM) water resistance handles everyday situations. The Tsuyosa Automatic (Green Dial) at 40mm with 50m (5 ATM) is similarly capable. The Pro Trek PRW-B1000-1 uses Sapphire with Anti-Reflective Coating while the Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops.

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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.