Casio G-Shock GA-B2100 CasiOak vs Hamilton Khaki Field Mechanical 38mm
Casio's diver meets Hamilton's field watch
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak (~$144) offers Casio Quartz (Solar-Powered) precision at $601 less than the Hamilton Khaki Field Mechanical 38mm (~$745). The Khaki Field Mechanical 38mm counters with Swiss Made craftsmanship and 50m (5 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 | Hamilton Khaki Field Mechanical 38mm |
|---|---|---|
| Price | ~$144 | ~$745 |
| Case Size | 44.4mm | 38mm |
| Movement | Quartz Module 5611 (Tough Solar + Bluetooth) | Hand-Wound H-50 (ETA 2801-2 base) |
| Caliber Type | Casio Quartz (Solar-Powered) | Hamilton/ETA Hand-Wound |
| Power Reserve | — | 80 Hours |
| Water Resistance | 200m (20 ATM) | 50m (5 ATM) |
| Crystal | Mineral Glass | Sapphire Crystal |
| Case Material | Carbon Core Guard Resin | Stainless Steel |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Hamilton's approach
Movement & Performance
Quartz Module 5611 (Tough Solar + Bluetooth) vs Hand-Wound H-50 (ETA 2801-2 base)
Wearability & Fit
44.4mm vs 38mm — different wrist presence
Value & Cost of Ownership
Casio is $601 more affordable
Water Resistance
200m (20 ATM) vs 50m (5 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 AmazonHamilton
Khaki Field Mechanical 38mm
Choose the Hamilton Khaki Field Mechanical 38mm if you value Hamilton/ETA Hand-Wound technology, Swiss Made heritage, and 38mm proportions. At ~$745, the Hand-Wound H-50 (ETA 2801-2 base) with 80 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Hamilton Khaki Field Mechanical 38mm represent two distinct approaches to fine watchmaking — the Casio bringing Made in Japan tradition while Hamilton delivers Swiss Made engineering.
Frequently Asked Questions
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