Citizen Tsuyosa Automatic (Green Dial) vs Seiko 5 SNKL23
Two timepieces compared — $250–$500 vs $100–$150
Quick Verdict
The Seiko 5 SNKL23 ($100–$150) delivers Seiko Automatic (no hand-winding, no hacking) technology in the tier below the Citizen Tsuyosa Automatic (Green Dial) ($250–$500). The 5 SNKL23 measures 37mm and is rated 30m (3 ATM). The Tsuyosa Automatic (Green Dial) justifies its premium with Made in Japan heritage and Automatic Caliber 8210. Both represent excellent choices in the timepiece category.
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Specifications Compared
| Feature | Citizen Tsuyosa Automatic (Green Dial) | Seiko 5 SNKL23 |
|---|---|---|
| Price | $250–$500 | $100–$150 |
| Case Size | 40mm | 37mm |
| Movement | Automatic Caliber 8210 | Automatic Caliber 7S26 |
| Caliber Type | Citizen/Miyota In-House Automatic | Seiko Automatic (no hand-winding, no hacking) |
| Power Reserve | 40 Hours | 41 Hours |
| Water Resistance | 50m (5 ATM) | 30m (3 ATM) |
| Crystal | Sapphire Crystal with Cyclops | Hardlex Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Made in Japan | Japanese Movement |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Seiko's approach
The Citizen Tsuyosa Automatic (Green Dial) features a Stainless Steel case at 40mm with Sapphire Crystal with Cyclops protection. The Seiko 5 SNKL23 offers Stainless Steel construction at 37mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Caliber 8210 vs Automatic Caliber 7S26
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 5 SNKL23 uses the Automatic Caliber 7S26 (Seiko Automatic (no hand-winding, no hacking), 41 Hours reserve) at 21,600 vph (3 Hz). The 5 SNKL23 offers a longer power reserve.
Wearability & Fit
40mm vs 37mm — different wrist presence
At 40mm, the Tsuyosa Automatic (Green Dial) has a bolder wrist presence compared to the 5 SNKL23 at 37mm. Water resistance differs: 50m (5 ATM) vs 30m (3 ATM).
Value & Cost of Ownership
Seiko sits in the lower tier
The Citizen Tsuyosa Automatic (Green Dial) sits at $250–$500 and the Seiko 5 SNKL23 at $100–$150. On the specs that outlast any price: the Tsuyosa Automatic (Green Dial) uses Sapphire Crystal with Cyclops with 40 Hours, against Hardlex Crystal and 41 Hours on the 5 SNKL23. Service intervals are typically 5-7 years for both.
Water Resistance
50m (5 ATM) vs 30m (3 ATM)
The Tsuyosa Automatic (Green Dial) is rated to 50m (5 ATM) while the 5 SNKL23 handles 30m (3 ATM). The Tsuyosa Automatic (Green Dial) is better suited for water activities.
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.
Check Price on AmazonSeiko
5 SNKL23
Choose the Seiko 5 SNKL23 if you value Seiko Automatic (no hand-winding, no hacking) technology, Japanese Movement heritage, and 37mm proportions. At $100–$150, the Automatic Caliber 7S26 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Tsuyosa Automatic (Green Dial) and Seiko 5 SNKL23 represent two distinct approaches to the timepiece category — the Citizen bringing Made in Japan tradition while Seiko delivers Japanese Movement engineering.
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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.