Head-to-Head Comparison

Citizen Tsuyosa Automatic (Green Dial) vs Tissot Seastar 1000 Automatic

Citizen's timepiece meets Tissot's diver

Quick Verdict

The Citizen Tsuyosa Automatic (Green Dial) ($250–$500) offers Citizen/Miyota In-House Automatic precision in the tier below the Tissot Seastar 1000 Automatic ($500–$1,000). The Tsuyosa Automatic (Green Dial) measures 40mm and is rated 50m (5 ATM). The Seastar 1000 Automatic counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional watches for their respective tiers.

CitizenTsuyosa Automatic (Green Dial)$250–$500 Check price TissotSeastar 1000 Automatic$500–$1,000 Check price

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Citizen

Tsuyosa Automatic (Green Dial)

$250–$500

Check Price Full Review

Tissot

Seastar 1000 Automatic

$500–$1,000

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Specifications Compared

Feature	Citizen Tsuyosa Automatic (Green Dial)	Tissot Seastar 1000 Automatic
Price	$250–$500	$500–$1,000
Case Size	40mm	40mm
Movement	Automatic Caliber 8210	Automatic Powermatic 80 (Caliber 80.111)
Caliber Type	Citizen/Miyota In-House Automatic	ETA/Tissot Automatic
Power Reserve	40 Hours	80 Hours
Water Resistance	50m (5 ATM)	300m (30 ATM)
Crystal	Sapphire Crystal with Cyclops	Sapphire Crystal
Case Material	Stainless Steel	Stainless Steel
Origin	Made in Japan	Swiss Made

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Citizen's design language vs Tissot's approach

The Citizen Tsuyosa Automatic (Green Dial) features a Stainless Steel case at 40mm with Sapphire Crystal with Cyclops protection. The Tissot Seastar 1000 Automatic offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Tissot

Automatic Caliber 8210 vs Automatic Powermatic 80 (Caliber 80.111)

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 Seastar 1000 Automatic uses the Automatic Powermatic 80 (Caliber 80.111) (ETA/Tissot Automatic, 80 Hours reserve) at 21,600 vph (3 Hz). The Seastar 1000 Automatic offers a longer power reserve.

📏

Wearability & Fit

Edge: Draw

40mm vs 40mm — different wrist presence

At 40mm, the Tsuyosa Automatic (Green Dial) is similarly sized compared to the Seastar 1000 Automatic at 40mm. Water resistance differs: 50m (5 ATM) vs 300m (30 ATM).

💰

Value & Cost of Ownership

Edge: Citizen

Citizen sits in the lower tier

The Citizen Tsuyosa Automatic (Green Dial) sits at $250–$500 and the Tissot Seastar 1000 Automatic at $500–$1,000. On the specs that outlast any price: the Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops with 40 Hours, against Sapphire Crystal and 80 Hours on the Seastar 1000 Automatic. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Tissot

50m (5 ATM) vs 300m (30 ATM)

The Tsuyosa Automatic (Green Dial) is rated to 50m (5 ATM) while the Seastar 1000 Automatic handles 300m (30 ATM). The Seastar 1000 Automatic 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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Tissot

Seastar 1000 Automatic

Choose the Tissot Seastar 1000 Automatic if you value ETA/Tissot Automatic technology, Swiss Made heritage, and 40mm proportions. At $500–$1,000, the Automatic Powermatic 80 (Caliber 80.111) with 80 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Citizen Tsuyosa Automatic (Green Dial) and Tissot Seastar 1000 Automatic represent two distinct approaches to fine watchmaking — the Citizen bringing Made in Japan tradition while Tissot delivers Swiss Made engineering.

Frequently Asked Questions

Neither is objectively better — they serve different preferences. The Citizen Tsuyosa Automatic (Green Dial) ($250–$500) offers Automatic Caliber 8210 with 40 Hours power reserve, while the Tissot Seastar 1000 Automatic ($500–$1,000) features Automatic Powermatic 80 (Caliber 80.111) with 300m (30 ATM) water resistance. Choose based on your priorities: Made in Japan craftsmanship vs Swiss Made engineering.

The Citizen Tsuyosa Automatic (Green Dial) offers better upfront value, sitting a tier lower at $250–$500. However, the Tissot Seastar 1000 Automatic 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 Seastar 1000 Automatic at 40mm with 300m (30 ATM) is similarly capable. The Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops while the Seastar 1000 Automatic uses Sapphire Crystal.

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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.