Updated
Casio G-Shock GA-B2100 CasiOak vs Stauer 1920s Retrograde
Casio's diver meets Stauer's dress watch
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak ($100–$150) and Stauer 1920s Retrograde ($100–$150) are closely matched timepieces at similar price points. The G-Shock GA-B2100 CasiOak emphasizes Casio Quartz (Solar-Powered) engineering while the 1920s Retrograde focuses on Stauer (USA brand, imported) 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 G-Shock GA-B2100 CasiOak | Stauer 1920s Retrograde |
|---|---|---|
| Price | $100–$150 | $100–$150 |
| Case Size | 45.4mm (48.5mm lug-to-lug, 11.9mm thick) | 43mm |
| Movement | Quartz Module 5689 (Tough Solar + Bluetooth) | Quartz |
| Caliber Type | Casio Quartz (Solar-Powered) | Quartz |
| Power Reserve | About 7 months on a full charge without light; about 18 months in power-saving (Casio) | Battery |
| Water Resistance | 200m (20 ATM) | 100m (10 ATM), as listed by Stauer |
| Crystal | Mineral Glass | Mineral crystal |
| Case Material | Carbon Core Guard Resin | Gold-tone stainless steel (listing photo shows a gold-tone finish; Amazon spec table says stainless steel) |
| Origin | Made in Japan | Stauer (USA brand, imported) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Stauer's approach
The Casio G-Shock GA-B2100 CasiOak features a Carbon Core Guard Resin case at 45.4mm (48.5mm lug-to-lug, 11.9mm thick) with Mineral Glass protection. The Stauer 1920s Retrograde offers Gold-tone stainless steel (listing photo shows a gold-tone finish; Amazon spec table says stainless steel) construction at 43mm with Mineral crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 5689 (Tough Solar + Bluetooth) vs Quartz
The G-Shock GA-B2100 CasiOak runs the Quartz Module 5689 (Tough Solar + Bluetooth) (Casio Quartz (Solar-Powered), About 7 months on a full charge without light; about 18 months in power-saving (Casio) power reserve) at standard frequency. The 1920s Retrograde uses the Quartz (Quartz, Battery reserve) at standard. The G-Shock GA-B2100 CasiOak edges ahead on power reserve.
Wearability & Fit
45.4mm (48.5mm lug-to-lug, 11.9mm thick) vs 43mm — different wrist presence
At 45.4mm (48.5mm lug-to-lug, 11.9mm thick), the G-Shock GA-B2100 CasiOak has a bolder wrist presence compared to the 1920s Retrograde at 43mm. Water resistance differs: 200m (20 ATM) vs 100m (10 ATM), as listed by Stauer.
Value & Cost of Ownership
Same tier — different value propositions
The Casio G-Shock GA-B2100 CasiOak sits at $100–$150 and the Stauer 1920s Retrograde at $100–$150. On the specs that outlast any price: the G-Shock GA-B2100 CasiOak uses Mineral Glass with About 7 months on a full charge without light; about 18 months in power-saving (Casio), against Mineral crystal and Battery on the 1920s Retrograde. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 100m (10 ATM), as listed by Stauer
The G-Shock GA-B2100 CasiOak is rated to 200m (20 ATM) while the 1920s Retrograde handles 100m (10 ATM), as listed by Stauer. The G-Shock GA-B2100 CasiOak is better suited for water activities.
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 $100–$150, it delivers Quartz Module 5689 (Tough Solar + Bluetooth) with About 7 months on a full charge without light; about 18 months in power-saving (Casio) power reserve.
Check Price on AmazonStauer
1920s Retrograde
Choose the Stauer 1920s Retrograde if you value Quartz technology, Stauer (USA brand, imported) heritage, and 43mm proportions. At $100–$150, the Quartz with Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Stauer 1920s Retrograde represent two distinct approaches to fine watchmaking — the Casio bringing Made in Japan tradition while Stauer delivers Stauer (USA brand, imported) engineering.
Frequently Asked Questions
More Comparisons
Explore These Watches
How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.