Casio G-Shock GA-B2100 CasiOak vs Tissot Gentleman Powermatic 80 Silicium
Casio's diver meets Tissot's dress watch
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak (~$144) offers Casio Quartz (Solar-Powered) precision at $806 less than the Tissot Gentleman Powermatic 80 Silicium (~$950). The Gentleman Powermatic 80 Silicium counters with Swiss Made (Swatch Group) craftsmanship and 100m (10 ATM) water resistance. Both are exceptional watches for their respective price points.
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Specifications Compared
| Feature | Casio G-Shock GA-B2100 CasiOak | Tissot Gentleman Powermatic 80 Silicium |
|---|---|---|
| Price | ~$144 | ~$950 |
| Case Size | 44.4mm | 40mm |
| Movement | Quartz Module 5611 (Tough Solar + Bluetooth) | Powermatic 80.811 (Silicon Hairspring) |
| Caliber Type | Casio Quartz (Solar-Powered) | ETA-Based Automatic with Silicon Hairspring |
| Power Reserve | — | 80 Hours |
| Water Resistance | 200m (20 ATM) | 100m (10 ATM) |
| Crystal | Mineral Glass | Sapphire Crystal |
| Case Material | Carbon Core Guard Resin | Stainless Steel |
| Origin | Made in Japan | Swiss Made (Swatch Group) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Tissot's approach
Movement & Performance
Quartz Module 5611 (Tough Solar + Bluetooth) vs Powermatic 80.811 (Silicon Hairspring)
Wearability & Fit
44.4mm vs 40mm — different wrist presence
Value & Cost of Ownership
Casio is $806 more affordable
Water Resistance
200m (20 ATM) vs 100m (10 ATM)
Our Verdict
Casio
G-Shock GA-B2100 CasiOak
Choose the Casio G-Shock GA-B2100 CasiOak if you prioritize Casio Quartz (Solar-Powered) engineering, Made in Japan craftsmanship, and 200m (20 ATM) water resistance. At ~$144, it delivers Quartz Module 5611 (Tough Solar + Bluetooth) with solid power reserve.
Check Price on AmazonTissot
Gentleman Powermatic 80 Silicium
Choose the Tissot Gentleman Powermatic 80 Silicium if you value ETA-Based Automatic with Silicon Hairspring technology, Swiss Made (Swatch Group) heritage, and 40mm proportions. At ~$950, the Powermatic 80.811 (Silicon Hairspring) with 80 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Tissot Gentleman Powermatic 80 Silicium represent two distinct approaches to fine watchmaking — the Casio bringing Made in Japan tradition while Tissot delivers Swiss Made (Swatch Group) engineering.
Frequently Asked Questions
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