Citizen Promaster Air Nighthawk vs Oris Aquis Date Calibre 400
Two divers compared — $250–$500 vs $2,500–$5,000
Quick Verdict
The Citizen Promaster Air Nighthawk ($250–$500) offers Eco-Drive Solar Quartz (No Battery Change) precision in the tier below the Oris Aquis Date Calibre 400 ($2,500–$5,000). The Promaster Air Nighthawk measures 42mm and is rated 200m (20 ATM). The Aquis Date Calibre 400 counters with Swiss Made craftsmanship and 300m (30 ATM) water resistance. Both are exceptional divers for their respective tiers.
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Specifications Compared
| Feature | Citizen Promaster Air Nighthawk | Oris Aquis Date Calibre 400 |
|---|---|---|
| Price | $250–$500 | $2,500–$5,000 |
| Case Size | 42mm | 41.5mm |
| Movement | Eco-Drive Caliber B877 | Automatic Calibre 400 |
| Caliber Type | Eco-Drive Solar Quartz (No Battery Change) | Oris In-House Manufacture |
| Power Reserve | 6 Months (Solar, Full Charge) | 120 Hours (5 Days) |
| Water Resistance | 200m (20 ATM) | 300m (30 ATM) |
| Crystal | Mineral Glass | Sapphire Crystal with Anti-Reflective Coating |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Citizen (Japan) | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Oris's approach
The Citizen Promaster Air Nighthawk features a Stainless Steel case at 42mm with Mineral Glass protection. The Oris Aquis Date Calibre 400 offers Stainless Steel construction at 41.5mm with Sapphire Crystal with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Eco-Drive Caliber B877 vs Automatic Calibre 400
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 Aquis Date Calibre 400 uses the Automatic Calibre 400 (Oris In-House Manufacture, 120 Hours (5 Days) reserve) at 28,800 vph (4 Hz). The Aquis Date Calibre 400 offers a longer power reserve.
Wearability & Fit
42mm vs 41.5mm — different wrist presence
At 42mm, the Promaster Air Nighthawk has a bolder wrist presence compared to the Aquis Date Calibre 400 at 41.5mm. Water resistance differs: 200m (20 ATM) vs 300m (30 ATM).
Value & Cost of Ownership
Citizen sits in the lower tier
The Citizen Promaster Air Nighthawk sits at $250–$500 and the Oris Aquis Date Calibre 400 at $2,500–$5,000. On the specs that outlast any price: the Promaster Air Nighthawk uses Mineral Glass with 6 Months (Solar, Full Charge), against Sapphire Crystal with Anti-Reflective Coating and 120 Hours (5 Days) on the Aquis Date Calibre 400. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 300m (30 ATM)
The Promaster Air Nighthawk is rated to 200m (20 ATM) while the Aquis Date Calibre 400 handles 300m (30 ATM). The Aquis Date Calibre 400 offers superior water resistance.
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 AmazonOris
Aquis Date Calibre 400
Choose the Oris Aquis Date Calibre 400 if you value Oris In-House Manufacture technology, Swiss Made heritage, and 41.5mm proportions. At $2,500–$5,000, the Automatic Calibre 400 with 120 Hours (5 Days) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Promaster Air Nighthawk and Oris Aquis Date Calibre 400 represent two distinct approaches to the diver category — the Citizen bringing Citizen (Japan) tradition while Oris 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.