Casio G-Shock GA-B2100 CasiOak vs Patek Philippe Calatrava 6119R
Casio's diver meets Patek Philippe's dress watch
Quick Verdict
The Casio G-Shock GA-B2100 CasiOak ($100–$150) offers Casio Quartz (Solar-Powered) precision in the tier below the Patek Philippe Calatrava 6119R ($25,000+). The G-Shock GA-B2100 CasiOak measures 45.4mm (48.5mm lug-to-lug, 11.9mm thick) and is rated 200m (20 ATM). The Calatrava 6119R counters with Swiss Made craftsmanship and 30m (3 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Casio G-Shock GA-B2100 CasiOak | Patek Philippe Calatrava 6119R |
|---|---|---|
| Price | $100–$150 | $25,000+ |
| Case Size | 45.4mm (48.5mm lug-to-lug, 11.9mm thick) | 39mm |
| Movement | Quartz Module 5689 (Tough Solar + Bluetooth) | Manual-Wind Caliber 30-255 PS |
| Caliber Type | Casio Quartz (Solar-Powered) | Patek Philippe In-House Manual-Wind |
| Power Reserve | About 7 months on a full charge without light; about 18 months in power-saving (Casio) | 65 Hours |
| Water Resistance | 200m (20 ATM) | 30m (3 ATM) |
| Crystal | Mineral Glass | Sapphire Crystal |
| Case Material | Carbon Core Guard Resin | 18k Rose Gold |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Patek Philippe'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 Patek Philippe Calatrava 6119R offers 18k Rose Gold construction at 39mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 5689 (Tough Solar + Bluetooth) vs Manual-Wind Caliber 30-255 PS
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 Calatrava 6119R uses the Manual-Wind Caliber 30-255 PS (Patek Philippe In-House Manual-Wind, 65 Hours reserve) at 28,800 vph (4 Hz). The Calatrava 6119R offers a longer power reserve.
Wearability & Fit
45.4mm (48.5mm lug-to-lug, 11.9mm thick) vs 39mm — 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 Calatrava 6119R at 39mm. Water resistance differs: 200m (20 ATM) vs 30m (3 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio G-Shock GA-B2100 CasiOak sits at $100–$150 and the Patek Philippe Calatrava 6119R at $25,000+. 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 Sapphire Crystal and 65 Hours on the Calatrava 6119R. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 30m (3 ATM)
The G-Shock GA-B2100 CasiOak is rated to 200m (20 ATM) while the Calatrava 6119R handles 30m (3 ATM). 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 AmazonPatek Philippe
Calatrava 6119R
Choose the Patek Philippe Calatrava 6119R if you value Patek Philippe In-House Manual-Wind technology, Swiss Made heritage, and 39mm proportions. At $25,000+, the Manual-Wind Caliber 30-255 PS with 65 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock GA-B2100 CasiOak and Patek Philippe Calatrava 6119R represent two distinct approaches to fine watchmaking — the Casio bringing Made in Japan tradition while Patek Philippe delivers Swiss Made engineering.
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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.