Casio G-Shock GA-B2100 CasiOak vs Invicta Pro Diver Automatic
Two divers compared — ~$144 vs ~$93
Quick Verdict
The Invicta Pro Diver Automatic (~$93) delivers Seiko NH35 Automatic (Hacking, Hand-Winding) technology at $51 less than the Casio G-Shock GA-B2100 CasiOak (~$144). The G-Shock GA-B2100 CasiOak justifies its premium with Made in Japan heritage and Quartz Module 5611 (Tough Solar + Bluetooth). Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Casio G-Shock GA-B2100 CasiOak | Invicta Pro Diver Automatic |
|---|---|---|
| Price | ~$144 | ~$93 |
| Case Size | 44.4mm | 40mm |
| Movement | Quartz Module 5611 (Tough Solar + Bluetooth) | Automatic Seiko NH35 |
| Caliber Type | Casio Quartz (Solar-Powered) | Seiko NH35 Automatic (Hacking, Hand-Winding) |
| Power Reserve | — | 41 Hours |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Carbon Core Guard Resin | Stainless Steel |
| Origin | Made in Japan | Japanese Movement (Seiko NH35) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Invicta's approach
Movement & Performance
Quartz Module 5611 (Tough Solar + Bluetooth) vs Automatic Seiko NH35
Wearability & Fit
44.4mm vs 40mm — different wrist presence
Value & Cost of Ownership
Invicta is $51 more affordable
Water Resistance
200m (20 ATM) vs 200m (20 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 AmazonInvicta
Pro Diver Automatic
Choose the Invicta Pro Diver Automatic if you value Seiko NH35 Automatic (Hacking, Hand-Winding) technology, Japanese Movement (Seiko NH35) heritage, and 40mm proportions. At ~$93, the Automatic Seiko NH35 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Invicta Pro Diver Automatic represent two distinct approaches to the diver category — the Casio bringing Made in Japan tradition while Invicta delivers Japanese Movement (Seiko NH35) engineering.
Frequently Asked Questions
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