Citizen Promaster Skyhawk A-T vs Oris Aquis Date Calibre 400
Citizen's chronograph meets Oris's diver
Quick Verdict
The Citizen Promaster Skyhawk A-T ($500–$1,000) offers Citizen Eco-Drive U680 (Solar + Radio-Controlled) precision in the tier below the Oris Aquis Date Calibre 400 ($2,500–$5,000). The Promaster Skyhawk A-T measures 45mm 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 watches for their respective tiers.
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Specifications Compared
| Feature | Citizen Promaster Skyhawk A-T | Oris Aquis Date Calibre 400 |
|---|---|---|
| Price | $500–$1,000 | $2,500–$5,000 |
| Case Size | 45mm | 41.5mm |
| Movement | Eco-Drive (Radio-Controlled, Atomic Timekeeping) | Automatic Calibre 400 |
| Caliber Type | Citizen Eco-Drive U680 (Solar + Radio-Controlled) | Oris In-House Manufacture |
| Power Reserve | — | 120 Hours (5 Days) |
| Water Resistance | 200m (20 ATM) | 300m (30 ATM) |
| Crystal | Sapphire Crystal | Sapphire Crystal with Anti-Reflective Coating |
| Case Material | Stainless Steel (Black Ion-Plated) | Stainless Steel |
| Origin | Made in Japan | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Oris's approach
The Citizen Promaster Skyhawk A-T features a Stainless Steel (Black Ion-Plated) case at 45mm with Sapphire Crystal 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 (Radio-Controlled, Atomic Timekeeping) vs Automatic Calibre 400
The Promaster Skyhawk A-T runs the Eco-Drive (Radio-Controlled, Atomic Timekeeping) (Citizen Eco-Drive U680 (Solar + Radio-Controlled), standard 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
45mm vs 41.5mm — different wrist presence
At 45mm, the Promaster Skyhawk A-T 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 Skyhawk A-T sits at $500–$1,000 and the Oris Aquis Date Calibre 400 at $2,500–$5,000. On the specs that outlast any price: the Promaster Skyhawk A-T uses Sapphire Crystal with a standard reserve, 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 Skyhawk A-T 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 Skyhawk A-T
Choose the Citizen Promaster Skyhawk A-T if you prioritize Citizen Eco-Drive U680 (Solar + Radio-Controlled) engineering, Made in Japan craftsmanship, and 200m (20 ATM) water resistance. At $500–$1,000, it delivers Eco-Drive (Radio-Controlled, Atomic Timekeeping) with solid 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 Skyhawk A-T and Oris Aquis Date Calibre 400 represent two distinct approaches to fine watchmaking — the Citizen bringing Made in 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.