Head-to-Head Comparison

Updated September 5, 2026

Casio Duro MDV106 Black vs Citizen Tsuyosa Automatic (Green Dial)

Casio's diver meets Citizen's timepiece

Quick Verdict

The Casio Duro MDV106 Black ($50–$100) offers Casio Quartz (Battery) precision in the tier below the Citizen Tsuyosa Automatic (Green Dial) ($250–$500). The Duro MDV106 Black measures 44mm and is rated 200m (20 ATM) Diver. The Tsuyosa Automatic (Green Dial) counters with Made in Japan craftsmanship and 50m (5 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioDuro MDV106 Black$50–$100 Check price CitizenTsuyosa Automatic (Green Dial)$250–$500 Check price

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Casio

Duro MDV106 Black

$50–$100

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Citizen

Tsuyosa Automatic (Green Dial)

$250–$500

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Specifications Compared

Feature	Casio Duro MDV106 Black	Citizen Tsuyosa Automatic (Green Dial)
Price	$50–$100	$250–$500
Case Size	44mm	40mm
Movement	Quartz Module 2784	Automatic Caliber 8210
Caliber Type	Casio Quartz (Battery)	Citizen/Miyota In-House Automatic
Power Reserve	3-Year Battery	40 Hours
Water Resistance	200m (20 ATM) Diver	50m (5 ATM)
Crystal	Mineral Glass	Sapphire Crystal with Cyclops
Case Material	Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Citizen's approach

The Casio Duro MDV106 Black features a Stainless Steel case at 44mm 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

Edge: Citizen

Quartz Module 2784 vs Automatic Caliber 8210

The Duro MDV106 Black runs the Quartz Module 2784 (Casio Quartz (Battery), 3-Year Battery 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

44mm vs 40mm — different wrist presence

At 44mm, the Duro MDV106 Black has a bolder wrist presence compared to the Tsuyosa Automatic (Green Dial) at 40mm. Water resistance differs: 200m (20 ATM) Diver vs 50m (5 ATM).

💰

Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio Duro MDV106 Black sits at $50–$100 and the Citizen Tsuyosa Automatic (Green Dial) at $250–$500. On the specs that outlast any price: the Duro MDV106 Black uses Mineral Glass with 3-Year Battery, 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

200m (20 ATM) Diver vs 50m (5 ATM)

The Duro MDV106 Black is rated to 200m (20 ATM) Diver while the Tsuyosa Automatic (Green Dial) handles 50m (5 ATM). The Duro MDV106 Black is better suited for water activities.

Our Verdict

Casio

Duro MDV106 Black

Choose the Casio Duro MDV106 Black if you prioritize Casio Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 200m (20 ATM) Diver water resistance. At $50–$100, it delivers Quartz Module 2784 with 3-Year Battery 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 Duro MDV106 Black and Citizen Tsuyosa Automatic (Green Dial) represent two distinct approaches to fine watchmaking — 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 Duro MDV106 Black is the better buy if you want quartz accuracy with no servicing. For water, the Casio Duro MDV106 Black is rated 200 m against 50 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Casio Duro MDV106 Black sits a band lower ($50–$100 against $250–$500), 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 Casio Duro MDV106 Black offers better upfront value, sitting a tier lower at $50–$100. However, the Citizen Tsuyosa Automatic (Green Dial) may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Duro MDV106 Black at 44mm with 200m (20 ATM) Diver water resistance handles everyday situations. The Tsuyosa Automatic (Green Dial) at 40mm with 50m (5 ATM) is similarly capable. The Duro MDV106 Black uses Mineral Glass while the Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops. Sapphire resists scratches noticeably better than mineral glass.

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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.