Casio MTP-S120L Solar Field vs Casio G-Shock GA-B2100 CasiOak
Casio's field watch meets Casio's diver
Quick Verdict
The Casio MTP-S120L Solar Field ($100–$150) and Casio G-Shock GA-B2100 CasiOak ($100–$150) are closely matched timepieces at similar price points. The MTP-S120L Solar Field emphasizes Casio Tough Solar Quartz engineering while the G-Shock GA-B2100 CasiOak focuses on Made in Japan craftsmanship.
Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.
Specifications Compared
| Feature | Casio MTP-S120L Solar Field | Casio G-Shock GA-B2100 CasiOak |
|---|---|---|
| Price | $100–$150 | $100–$150 |
| Case Size | 44.5mm | 44.4mm |
| Movement | Solar-Powered Quartz | Quartz Module 5611 (Tough Solar + Bluetooth) |
| Caliber Type | Casio Tough Solar Quartz | Casio Quartz (Solar-Powered) |
| Power Reserve | Months on a full solar charge; no battery replacement | — |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Mineral Crystal | Mineral Glass |
| Case Material | Stainless Steel | Carbon Core Guard Resin |
| Origin | Casio (Japan) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Casio's approach
Movement & Performance
Solar-Powered Quartz vs Quartz Module 5611 (Tough Solar + Bluetooth)
Wearability & Fit
44.5mm vs 44.4mm — different wrist presence
Value & Cost of Ownership
Closely priced — different value propositions
Water Resistance
100m (10 ATM) vs 200m (20 ATM)
Our Verdict
Casio
MTP-S120L Solar Field
Choose the Casio MTP-S120L Solar Field if you prioritize Casio Tough Solar Quartz engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $100–$150, it delivers Solar-Powered Quartz with Months on a full solar charge; no battery replacement 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 $100–$150, the Quartz Module 5611 (Tough Solar + Bluetooth) with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio MTP-S120L Solar Field and Casio G-Shock GA-B2100 CasiOak represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Casio delivers Made in Japan engineering.
Frequently Asked Questions
More Comparisons
Seiko Prospex Turtle vs G-Shock CasiOak
Mechanical dive heritage vs digital indestructibility
Tag Heuer Carrera Chronograph vs Casio MTP-S120L Solar Field
Tag Heuer's chronograph meets Casio's field watch
Tag Heuer Carrera Chronograph vs Casio G-Shock GA-B2100 CasiOak
Tag Heuer's chronograph meets Casio's diver