Citizen Tsuyosa Automatic (Green Dial) vs Casio G-Shock GA-B2100 CasiOak
Citizen's timepiece meets Casio's diver
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak (~$144) delivers Casio Quartz (Solar-Powered) technology at $188 less than the Citizen Tsuyosa Automatic (Green Dial) (~$332). The Tsuyosa Automatic (Green Dial) justifies its premium with Made in Japan heritage and Automatic Caliber 8210. Both represent excellent choices in the luxury watch category.
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Specifications Compared
| Feature | Citizen Tsuyosa Automatic (Green Dial) | Casio G-Shock GA-B2100 CasiOak |
|---|---|---|
| Price | ~$332 | ~$144 |
| Case Size | 40mm | 44.4mm |
| Movement | Automatic Caliber 8210 | Quartz Module 5611 (Tough Solar + Bluetooth) |
| Caliber Type | Citizen/Miyota In-House Automatic | Casio Quartz (Solar-Powered) |
| Power Reserve | 40 Hours | — |
| Water Resistance | 50m (5 ATM) | 200m (20 ATM) |
| Crystal | Sapphire Crystal with Cyclops | Mineral Glass |
| Case Material | Stainless Steel | Carbon Core Guard Resin |
| Origin | Made in Japan | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Casio's approach
Movement & Performance
Automatic Caliber 8210 vs Quartz Module 5611 (Tough Solar + Bluetooth)
Wearability & Fit
40mm vs 44.4mm — different wrist presence
Value & Cost of Ownership
Casio is $188 more affordable
Water Resistance
50m (5 ATM) vs 200m (20 ATM)
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 ~$332, it delivers Automatic Caliber 8210 with 40 Hours power reserve.
Check Price on AmazonCasio
G-Shock GA-B2100 CasiOak
Choose the Casio G-Shock GA-B2100 CasiOak if you value Casio Quartz (Solar-Powered) technology, Made in Japan heritage, and 44.4mm proportions. At ~$144, the Quartz Module 5611 (Tough Solar + Bluetooth) with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Tsuyosa Automatic (Green Dial) and Casio G-Shock GA-B2100 CasiOak represent two distinct approaches to fine watchmaking — the Citizen bringing Made in Japan tradition while Casio delivers Made in Japan engineering.
Frequently Asked Questions
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