Casio G-Shock DW-5600 Square vs Seiko Prospex Sea Solar SNE597
Two divers compared — $50–$100 vs $500–$1,000
Quick Verdict
The Casio G-Shock DW-5600 Square ($50–$100) offers Casio Digital Quartz (Battery) precision in the tier below the Seiko Prospex Sea Solar SNE597 ($500–$1,000). The G-Shock DW-5600 Square measures 42.8mm (Square) and is rated 200m (20 ATM). The Prospex Sea Solar SNE597 counters with Seiko (Japan) craftsmanship and 200m Diver water resistance. Both are exceptional divers for their respective tiers.
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Specifications Compared
| Feature | Casio G-Shock DW-5600 Square | Seiko Prospex Sea Solar SNE597 |
|---|---|---|
| Price | $50–$100 | $500–$1,000 |
| Case Size | 42.8mm (Square) | 41.0mm (48.8mm lug-to-lug, 11.3mm thick) |
| Movement | Quartz Module 3229 | Solar Quartz |
| Caliber Type | Casio Digital Quartz (Battery) | Seiko Solar Quartz |
| Power Reserve | 2-Year Battery | — |
| Water Resistance | 200m (20 ATM) | 200m Diver |
| Crystal | Mineral Glass | Sapphire |
| Case Material | Resin | — |
| Origin | Casio (Japan) | Seiko (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Seiko's approach
The Casio G-Shock DW-5600 Square features a Resin case at 42.8mm (Square) with Mineral Glass protection. The Seiko Prospex Sea Solar SNE597 offers steel construction at 41.0mm (48.8mm lug-to-lug, 11.3mm thick) with Sapphire. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Quartz Module 3229 vs Solar Quartz
The G-Shock DW-5600 Square runs the Quartz Module 3229 (Casio Digital Quartz (Battery), 2-Year Battery power reserve) at standard frequency. The Prospex Sea Solar SNE597 uses the Solar Quartz (Seiko Solar Quartz, standard reserve) at standard. The G-Shock DW-5600 Square edges ahead on power reserve.
Wearability & Fit
42.8mm (Square) vs 41.0mm (48.8mm lug-to-lug, 11.3mm thick) — different wrist presence
At 42.8mm (Square), the G-Shock DW-5600 Square has a bolder wrist presence compared to the Prospex Sea Solar SNE597 at 41.0mm (48.8mm lug-to-lug, 11.3mm thick). Water resistance differs: 200m (20 ATM) vs 200m Diver.
Value & Cost of Ownership
Casio sits in the lower tier
The Casio G-Shock DW-5600 Square sits at $50–$100 and the Seiko Prospex Sea Solar SNE597 at $500–$1,000. On the specs that outlast any price: the G-Shock DW-5600 Square uses Mineral Glass with 2-Year Battery, against Sapphire and a standard reserve on the Prospex Sea Solar SNE597. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m Diver
The G-Shock DW-5600 Square is rated to 200m (20 ATM) while the Prospex Sea Solar SNE597 handles 200m Diver. Both offer identical water resistance ratings.
Our Verdict
Casio
G-Shock DW-5600 Square
Choose the Casio G-Shock DW-5600 Square if you prioritize Casio Digital Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 200m (20 ATM) water resistance. At $50–$100, it delivers Quartz Module 3229 with 2-Year Battery power reserve.
Check Price on AmazonSeiko
Prospex Sea Solar SNE597
Choose the Seiko Prospex Sea Solar SNE597 if you value Seiko Solar Quartz technology, Seiko (Japan) heritage, and 41.0mm (48.8mm lug-to-lug, 11.3mm thick) proportions. At $500–$1,000, the Solar Quartz with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio G-Shock DW-5600 Square and Seiko Prospex Sea Solar SNE597 represent two distinct approaches to the diver category — the Casio bringing Casio (Japan) tradition while Seiko delivers Seiko (Japan) engineering.
Frequently Asked Questions
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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.