Citizen Promaster Air Nighthawk vs Invicta Pro Diver Automatic 23681
Two divers compared — $250–$500 vs $50–$100
Quick Verdict
The Invicta Pro Diver Automatic 23681 ($50–$100) delivers Automatic (Seiko NH35A) technology in the tier below the Citizen Promaster Air Nighthawk ($250–$500). The Pro Diver Automatic 23681 measures 40mm and is rated 200m. 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 | Invicta Pro Diver Automatic 23681 |
|---|---|---|
| Price | $250–$500 | $50–$100 |
| Case Size | 42mm | 40mm |
| Movement | Eco-Drive Caliber B877 | Automatic NH35A |
| Caliber Type | Eco-Drive Solar Quartz (No Battery Change) | Automatic (Seiko NH35A) |
| Power Reserve | 6 Months (Solar, Full Charge) | — |
| Water Resistance | 200m (20 ATM) | 200m |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Stainless Steel | — |
| Origin | Citizen (Japan) | Invicta (Japanese movement) |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Invicta's approach
The Citizen Promaster Air Nighthawk features a Stainless Steel case at 42mm with Mineral Glass protection. The Invicta Pro Diver Automatic 23681 offers steel construction at 40mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Eco-Drive Caliber B877 vs Automatic NH35A
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 Pro Diver Automatic 23681 uses the Automatic NH35A (Automatic (Seiko NH35A), standard reserve) at standard. The Promaster Air Nighthawk edges ahead on power reserve.
Wearability & Fit
42mm vs 40mm — different wrist presence
At 42mm, the Promaster Air Nighthawk has a bolder wrist presence compared to the Pro Diver Automatic 23681 at 40mm. Water resistance differs: 200m (20 ATM) vs 200m.
Value & Cost of Ownership
Invicta sits in the lower tier
The Citizen Promaster Air Nighthawk sits at $250–$500 and the Invicta Pro Diver Automatic 23681 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 a standard reserve on the Pro Diver Automatic 23681. Service intervals are typically 5-7 years for both.
Water Resistance
200m (20 ATM) vs 200m
The Promaster Air Nighthawk is rated to 200m (20 ATM) while the Pro Diver Automatic 23681 handles 200m. 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 AmazonInvicta
Pro Diver Automatic 23681
Choose the Invicta Pro Diver Automatic 23681 if you value Automatic (Seiko NH35A) technology, Invicta (Japanese movement) heritage, and 40mm proportions. At $50–$100, the Automatic NH35A with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Promaster Air Nighthawk and Invicta Pro Diver Automatic 23681 represent two distinct approaches to the diver category — the Citizen bringing Citizen (Japan) tradition while Invicta delivers Invicta (Japanese movement) 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.