Bulova Devil Diver Oceanographer 96B350 vs Casio G-Shock GA-B2100 CasiOak
Two divers compared — $500–$1,000 vs $100–$150
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak ($100–$150) delivers Casio Quartz (Solar-Powered) technology in the tier below the Bulova Devil Diver Oceanographer 96B350 ($500–$1,000). The G-Shock GA-B2100 CasiOak measures 45.4mm (48.5mm lug-to-lug, 11.9mm thick) and is rated 200m (20 ATM). The Devil Diver Oceanographer 96B350 justifies its premium with Made in Japan (Movement) heritage and Automatic Miyota 8215. Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Bulova Devil Diver Oceanographer 96B350 | Casio G-Shock GA-B2100 CasiOak |
|---|---|---|
| Price | $500–$1,000 | $100–$150 |
| Case Size | 41mm | 45.4mm (48.5mm lug-to-lug, 11.9mm thick) |
| Movement | Automatic Miyota 8215 | Quartz Module 5689 (Tough Solar + Bluetooth) |
| Caliber Type | Miyota Automatic | Casio Quartz (Solar-Powered) |
| Power Reserve | 42 Hours | About 7 months on a full charge without light; about 18 months in power-saving (Casio) |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Sapphire Crystal | Mineral Glass |
| Case Material | Stainless Steel | Carbon Core Guard Resin |
| Origin | Made in Japan (Movement) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Bulova's design language vs Casio's approach
The Bulova Devil Diver Oceanographer 96B350 features a Stainless Steel case at 41mm with Sapphire Crystal protection. The Casio G-Shock GA-B2100 CasiOak offers Carbon Core Guard Resin construction at 45.4mm (48.5mm lug-to-lug, 11.9mm thick) with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic Miyota 8215 vs Quartz Module 5689 (Tough Solar + Bluetooth)
The Devil Diver Oceanographer 96B350 runs the Automatic Miyota 8215 (Miyota Automatic, 42 Hours power reserve) at 21,600 vph (3 Hz) frequency. The G-Shock GA-B2100 CasiOak uses 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) reserve) at standard. The Devil Diver Oceanographer 96B350 edges ahead on power reserve.
Wearability & Fit
41mm vs 45.4mm (48.5mm lug-to-lug, 11.9mm thick) — different wrist presence
At 41mm, the Devil Diver Oceanographer 96B350 wears more compactly on smaller wrists compared to the G-Shock GA-B2100 CasiOak at 45.4mm (48.5mm lug-to-lug, 11.9mm thick). Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Bulova Devil Diver Oceanographer 96B350 sits at $500–$1,000 and the Casio G-Shock GA-B2100 CasiOak at $100–$150. On the specs that outlast any price: the Devil Diver Oceanographer 96B350 uses Sapphire Crystal with 42 Hours, against Mineral Glass and About 7 months on a full charge without light; about 18 months in power-saving (Casio) on the G-Shock GA-B2100 CasiOak. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m (20 ATM)
The Devil Diver Oceanographer 96B350 is rated to 200m (20 ATM) while the G-Shock GA-B2100 CasiOak handles 200m (20 ATM). Both offer identical water resistance ratings.
Our Verdict
Bulova
Devil Diver Oceanographer 96B350
Choose the Bulova Devil Diver Oceanographer 96B350 if you prioritize Miyota Automatic engineering, Made in Japan (Movement) craftsmanship, and 200m (20 ATM) water resistance. At $500–$1,000, it delivers Automatic Miyota 8215 with 42 Hours 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 45.4mm (48.5mm lug-to-lug, 11.9mm thick) proportions. At $100–$150, the 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 makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Bulova Devil Diver Oceanographer 96B350 and Casio G-Shock GA-B2100 CasiOak represent two distinct approaches to the diver category — the Bulova bringing Made in Japan (Movement) tradition while Casio delivers Made in Japan engineering.
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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.