Casio G-Shock GA-B2100 CasiOak vs Orient Sun & Moon
Casio's diver meets Orient's dress watch
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak (~$144) offers Casio Quartz (Solar-Powered) precision at $177 less than the Orient Sun & Moon (~$321). The Sun & Moon counters with Made in Japan 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 | Orient Sun & Moon |
|---|---|---|
| Price | ~$144 | ~$321 |
| Case Size | 44.4mm | 41.5mm |
| Movement | Quartz Module 5611 (Tough Solar + Bluetooth) | Automatic Caliber F6B24 |
| Caliber Type | Casio Quartz (Solar-Powered) | Orient In-House Automatic (Hacking, Hand-Winding) |
| Power Reserve | — | 40 Hours |
| Water Resistance | 200m (20 ATM) | 50m (5 ATM) |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Carbon Core Guard Resin | Stainless Steel |
| Origin | Made in Japan | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Orient's approach
Movement & Performance
Quartz Module 5611 (Tough Solar + Bluetooth) vs Automatic Caliber F6B24
Wearability & Fit
44.4mm vs 41.5mm — different wrist presence
Value & Cost of Ownership
Casio is $177 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 AmazonOrient
Sun & Moon
Choose the Orient Sun & Moon if you value Orient In-House Automatic (Hacking, Hand-Winding) technology, Made in Japan heritage, and 41.5mm proportions. At ~$321, the Automatic Caliber F6B24 with 40 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Orient Sun & Moon represent two distinct approaches to fine watchmaking — the Casio bringing Made in Japan tradition while Orient delivers Made in Japan engineering.