Head-to-Head Comparison

Updated September 5, 2026

Citizen Tsuyosa Automatic (Green Dial) vs Frederique Constant Highlife Automatic COSC

Two timepieces compared — $250–$500 vs $1,500–$2,500

Quick Verdict

The Citizen Tsuyosa Automatic (Green Dial) ($250–$500) offers Citizen/Miyota In-House Automatic precision in the tier below the Frederique Constant Highlife Automatic COSC ($1,500–$2,500). The Tsuyosa Automatic (Green Dial) measures 40mm and is rated 50m (5 ATM). The Highlife Automatic COSC counters with Swiss Made craftsmanship and 100m (10 ATM) water resistance. Both are exceptional timepieces for their respective tiers.

CitizenTsuyosa Automatic (Green Dial)$250–$500 Check price Frederique ConstantHighlife Automatic COSC$1,500–$2,500 Check price

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Citizen

Tsuyosa Automatic (Green Dial)

$250–$500

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Frederique Constant

Highlife Automatic COSC

$1,500–$2,500

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Specifications Compared

Feature	Citizen Tsuyosa Automatic (Green Dial)	Frederique Constant Highlife Automatic COSC
Price	$250–$500	$1,500–$2,500
Case Size	40mm	39mm
Movement	Automatic Caliber 8210	Automatic FC-303 (COSC)
Caliber Type	Citizen/Miyota In-House Automatic	COSC-Certified Automatic
Power Reserve	40 Hours	38 Hours
Water Resistance	50m (5 ATM)	100m (10 ATM)
Crystal	Sapphire Crystal with Cyclops	Convex Sapphire
Case Material	Stainless Steel	Stainless Steel
Origin	Made in Japan	Swiss Made

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Citizen's design language vs Frederique Constant's approach

The Citizen Tsuyosa Automatic (Green Dial) features a Stainless Steel case at 40mm with Sapphire Crystal with Cyclops protection. The Frederique Constant Highlife Automatic COSC offers Stainless Steel construction at 39mm with Convex Sapphire. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Citizen

Automatic Caliber 8210 vs Automatic FC-303 (COSC)

The Tsuyosa Automatic (Green Dial) runs the Automatic Caliber 8210 (Citizen/Miyota In-House Automatic, 40 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Highlife Automatic COSC uses the Automatic FC-303 (COSC) (COSC-Certified Automatic, 38 Hours reserve) at 28,800 vph (4 Hz). The Tsuyosa Automatic (Green Dial) edges ahead on power reserve.

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Wearability & Fit

Edge: Frederique Constant

40mm vs 39mm — different wrist presence

At 40mm, the Tsuyosa Automatic (Green Dial) has a bolder wrist presence compared to the Highlife Automatic COSC at 39mm. Water resistance differs: 50m (5 ATM) vs 100m (10 ATM).

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Value & Cost of Ownership

Edge: Citizen

Citizen sits in the lower tier

The Citizen Tsuyosa Automatic (Green Dial) sits at $250–$500 and the Frederique Constant Highlife Automatic COSC at $1,500–$2,500. On the specs that outlast any price: the Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops with 40 Hours, against Convex Sapphire and 38 Hours on the Highlife Automatic COSC. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Frederique Constant

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

The Tsuyosa Automatic (Green Dial) is rated to 50m (5 ATM) while the Highlife Automatic COSC handles 100m (10 ATM). The Highlife Automatic COSC offers superior water resistance.

Our Verdict

Citizen

Tsuyosa Automatic (Green Dial)

Choose the Citizen Tsuyosa Automatic (Green Dial) 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.

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Frederique Constant

Highlife Automatic COSC

Choose the Frederique Constant Highlife Automatic COSC if you value COSC-Certified Automatic technology, Swiss Made heritage, and 39mm proportions. At $1,500–$2,500, the Automatic FC-303 (COSC) with 38 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Citizen Tsuyosa Automatic (Green Dial) and Frederique Constant Highlife Automatic COSC represent two distinct approaches to the timepiece category — the Citizen bringing Made in Japan tradition while Frederique Constant delivers Swiss Made engineering.

Frequently Asked Questions

For water, the Frederique Constant Highlife Automatic COSC 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 $1,500–$2,500), 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 Citizen Tsuyosa Automatic (Green Dial) offers better upfront value, sitting a tier lower at $250–$500. However, the Frederique Constant Highlife Automatic COSC may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Tsuyosa Automatic (Green Dial) at 40mm with 50m (5 ATM) water resistance handles everyday situations. The Highlife Automatic COSC at 39mm with 100m (10 ATM) is similarly capable. The Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops while the Highlife Automatic COSC uses Convex Sapphire.

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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.