Casio Pro Trek PRG340-1 vs Citizen Promaster Air Nighthawk
Casio's timepiece meets Citizen's diver
Quick Verdict
The Casio Pro Trek PRG340-1 ($150–$250) offers Tough Solar Quartz (No Battery Change) precision in the tier below the Citizen Promaster Air Nighthawk ($250–$500). The Pro Trek PRG340-1 measures 54.7 × 51.7 × 15.1mm and is rated 100m (10 ATM). The Promaster Air Nighthawk counters with Citizen (Japan) craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Casio Pro Trek PRG340-1 | Citizen Promaster Air Nighthawk |
|---|---|---|
| Price | $150–$250 | $250–$500 |
| Case Size | 54.7 × 51.7 × 15.1mm | 42mm |
| Movement | Tough Solar (Solar Quartz) | Eco-Drive Caliber B877 |
| Caliber Type | Tough Solar Quartz (No Battery Change) | Eco-Drive Solar Quartz (No Battery Change) |
| Power Reserve | Tough Solar (Rechargeable) | 6 Months (Solar, Full Charge) |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Mineral Glass | Mineral Glass |
| Case Material | Bio-Based Resin | Stainless Steel |
| Origin | Casio (Japan) | Citizen (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Citizen's approach
The Casio Pro Trek PRG340-1 features a Bio-Based Resin case at 54.7 × 51.7 × 15.1mm with Mineral Glass protection. The Citizen Promaster Air Nighthawk offers Stainless Steel construction at 42mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Tough Solar (Solar Quartz) vs Eco-Drive Caliber B877
The Pro Trek PRG340-1 runs the Tough Solar (Solar Quartz) (Tough Solar Quartz (No Battery Change), Tough Solar (Rechargeable) power reserve) at standard frequency. The Promaster Air Nighthawk uses the Eco-Drive Caliber B877 (Eco-Drive Solar Quartz (No Battery Change), 6 Months (Solar, Full Charge) reserve) at standard. The Promaster Air Nighthawk offers a longer power reserve.
Wearability & Fit
54.7 × 51.7 × 15.1mm vs 42mm — different wrist presence
At 54.7 × 51.7 × 15.1mm, the Pro Trek PRG340-1 has a bolder wrist presence compared to the Promaster Air Nighthawk at 42mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Casio sits in the lower tier
The Casio Pro Trek PRG340-1 sits at $150–$250 and the Citizen Promaster Air Nighthawk at $250–$500. On the specs that outlast any price: the Pro Trek PRG340-1 uses Mineral Glass with Tough Solar (Rechargeable), against Mineral Glass and 6 Months (Solar, Full Charge) on the Promaster Air Nighthawk. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 200m (20 ATM)
The Pro Trek PRG340-1 is rated to 100m (10 ATM) while the Promaster Air Nighthawk handles 200m (20 ATM). The Promaster Air Nighthawk offers superior water resistance.
Our Verdict
Casio
Pro Trek PRG340-1
Choose the Casio Pro Trek PRG340-1 if you prioritize Tough Solar Quartz (No Battery Change) engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $150–$250, it delivers Tough Solar (Solar Quartz) with Tough Solar (Rechargeable) power reserve.
Check Price on AmazonCitizen
Promaster Air Nighthawk
Choose the Citizen Promaster Air Nighthawk if you value Eco-Drive Solar Quartz (No Battery Change) technology, Citizen (Japan) heritage, and 42mm proportions. At $250–$500, the Eco-Drive Caliber B877 with 6 Months (Solar, Full Charge) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Casio Pro Trek PRG340-1 and Citizen Promaster Air Nighthawk represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Citizen delivers Citizen (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.