Citizen Promaster Air Nighthawk vs Seiko Prospex Samurai SRPL13
Two divers compared — $250–$500 vs $500–$1,000
Quick Verdict
The Citizen Promaster Air Nighthawk ($250–$500) offers Eco-Drive Solar Quartz (No Battery Change) precision in the tier below the Seiko Prospex Samurai SRPL13 ($500–$1,000). The Promaster Air Nighthawk measures 42mm and is rated 200m (20 ATM). The Prospex Samurai SRPL13 counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional divers for their respective tiers.
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Specifications Compared
| Feature | Citizen Promaster Air Nighthawk | Seiko Prospex Samurai SRPL13 |
|---|---|---|
| Price | $250–$500 | $500–$1,000 |
| Case Size | 42mm | 41.7mm |
| Movement | Eco-Drive Caliber B877 | Automatic Caliber 4R35 |
| Caliber Type | Eco-Drive Solar Quartz (No Battery Change) | Seiko In-House Automatic |
| Power Reserve | 6 Months (Solar, Full Charge) | 41 Hours |
| Water Resistance | 200m (20 ATM) | 200m (20 ATM) |
| Crystal | Mineral Glass | Hardlex Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Citizen (Japan) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Citizen's design language vs Seiko's approach
The Citizen Promaster Air Nighthawk features a Stainless Steel case at 42mm with Mineral Glass protection. The Seiko Prospex Samurai SRPL13 offers Stainless Steel construction at 41.7mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Eco-Drive Caliber B877 vs Automatic Caliber 4R35
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 Prospex Samurai SRPL13 uses the Automatic Caliber 4R35 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The Prospex Samurai SRPL13 offers a longer power reserve.
Wearability & Fit
42mm vs 41.7mm — different wrist presence
At 42mm, the Promaster Air Nighthawk has a bolder wrist presence compared to the Prospex Samurai SRPL13 at 41.7mm. Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Citizen sits in the lower tier
The Citizen Promaster Air Nighthawk sits at $250–$500 and the Seiko Prospex Samurai SRPL13 at $500–$1,000. On the specs that outlast any price: the Promaster Air Nighthawk uses Mineral Glass with 6 Months (Solar, Full Charge), against Hardlex Crystal and 41 Hours on the Prospex Samurai SRPL13. 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 Prospex Samurai SRPL13 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 AmazonSeiko
Prospex Samurai SRPL13
Choose the Seiko Prospex Samurai SRPL13 if you value Seiko In-House Automatic technology, Made in Japan heritage, and 41.7mm proportions. At $500–$1,000, the Automatic Caliber 4R35 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Citizen Promaster Air Nighthawk and Seiko Prospex Samurai SRPL13 represent two distinct approaches to the diver category — the Citizen bringing Citizen (Japan) tradition while Seiko delivers Made in 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.