Citizen Promaster Air Nighthawk vs Casio G-Shock DW-5600 Square
Two divers compared — $250–$500 vs $50–$100
Quick Verdict
The Casio G-Shock DW-5600 Square ($50–$100) delivers Casio Digital Quartz (Battery) technology in the tier below the Citizen Promaster Air Nighthawk ($250–$500). The G-Shock DW-5600 Square measures 42.8mm (Square) and is rated 200m (20 ATM). The Promaster Air Nighthawk justifies its premium with Citizen (Japan) heritage and Eco-Drive Caliber B877. Both represent excellent choices in the diver category.
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Specifications Compared
| Feature | Citizen Promaster Air Nighthawk | Casio G-Shock DW-5600 Square |
|---|---|---|
| Price | $250–$500 | $50–$100 |
| Case Size | 42mm | 42.8mm (Square) |
| Movement | Eco-Drive Caliber B877 | Quartz Module 3229 |
| Caliber Type | Eco-Drive Solar Quartz (No Battery Change) | Casio Digital Quartz (Battery) |
| Power Reserve | 6 Months (Solar, Full Charge) | 2-Year Battery |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Stainless Steel | Resin |
| Origin | Citizen (Japan) | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Casio's approach
The Citizen Promaster Air Nighthawk features a Stainless Steel case at 42mm with Mineral Glass protection. The Casio G-Shock DW-5600 Square offers Resin construction at 42.8mm (Square) with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Eco-Drive Caliber B877 vs Quartz Module 3229
The Promaster Air Nighthawk runs the Eco-Drive Caliber B877 (Eco-Drive Solar Quartz (No Battery Change), 6 Months (Solar, Full Charge) power reserve) at standard frequency. The G-Shock DW-5600 Square uses the Quartz Module 3229 (Casio Digital Quartz (Battery), 2-Year Battery reserve) at standard. The Promaster Air Nighthawk edges ahead on power reserve.
Wearability & Fit
42mm vs 42.8mm (Square) — different wrist presence
At 42mm, the Promaster Air Nighthawk wears more compactly on smaller wrists compared to the G-Shock DW-5600 Square at 42.8mm (Square). Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Citizen Promaster Air Nighthawk sits at $250–$500 and the Casio G-Shock DW-5600 Square at $50–$100. On the specs that outlast any price: the Promaster Air Nighthawk uses Mineral Glass with 6 Months (Solar, Full Charge), against Mineral Glass and 2-Year Battery on the G-Shock DW-5600 Square. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m (20 ATM)
The Promaster Air Nighthawk is rated to 200m (20 ATM) while the G-Shock DW-5600 Square handles 200m (20 ATM). Both offer identical water resistance ratings.
Our Verdict
Citizen
Promaster Air Nighthawk
Choose the Citizen Promaster Air Nighthawk if you prioritize Eco-Drive Solar Quartz (No Battery Change) engineering, Citizen (Japan) craftsmanship, and 200m (20 ATM) water resistance. At $250–$500, it delivers Eco-Drive Caliber B877 with 6 Months (Solar, Full Charge) power reserve.
Check Price on AmazonCasio
G-Shock DW-5600 Square
Choose the Casio G-Shock DW-5600 Square if you value Casio Digital Quartz (Battery) technology, Casio (Japan) heritage, and 42.8mm (Square) proportions. At $50–$100, the Quartz Module 3229 with 2-Year Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Promaster Air Nighthawk and Casio G-Shock DW-5600 Square represent two distinct approaches to the diver category — the Citizen bringing Citizen (Japan) tradition while Casio delivers Casio (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.