Updated
Casio Pro Trek PRW-B1000-1 vs Seiko Prospex Samurai SRPL13
Casio's timepiece meets Seiko's diver
Quick Verdict
The Casio Pro Trek PRW-B1000-1 ($500–$1,000) and Seiko Prospex Samurai SRPL13 ($500–$1,000) are closely matched timepieces at similar price points. The Pro Trek PRW-B1000-1 emphasizes Tough Solar Quartz, Multi-Band 6 + Bluetooth engineering while the Prospex Samurai SRPL13 focuses on Made in Japan craftsmanship.
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Specifications Compared
| Feature | Casio Pro Trek PRW-B1000-1 | Seiko Prospex Samurai SRPL13 |
|---|---|---|
| Price | $500–$1,000 | $500–$1,000 |
| Case Size | 50.8 × 45.8 × 14.9mm | 41.7mm |
| Movement | Tough Solar (Solar Quartz), Radio-Controlled | Automatic Caliber 4R35 |
| Caliber Type | Tough Solar Quartz, Multi-Band 6 + Bluetooth | Seiko In-House Automatic |
| Power Reserve | Tough Solar (Rechargeable) | 41 Hours |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Sapphire with Anti-Reflective Coating | Hardlex Crystal |
| Case Material | Bio-Based Resin / Stainless Steel | Stainless Steel |
| Origin | Casio (Japan) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Casio's design language vs Seiko's approach
The Casio Pro Trek PRW-B1000-1 features a Bio-Based Resin / Stainless Steel case at 50.8 × 45.8 × 14.9mm with Sapphire with Anti-Reflective Coating 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
Tough Solar (Solar Quartz), Radio-Controlled vs Automatic Caliber 4R35
The Pro Trek PRW-B1000-1 runs the Tough Solar (Solar Quartz), Radio-Controlled (Tough Solar Quartz, Multi-Band 6 + Bluetooth, Tough Solar (Rechargeable) 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
50.8 × 45.8 × 14.9mm vs 41.7mm — different wrist presence
At 50.8 × 45.8 × 14.9mm, the Pro Trek PRW-B1000-1 has a bolder wrist presence compared to the Prospex Samurai SRPL13 at 41.7mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Casio Pro Trek PRW-B1000-1 sits at $500–$1,000 and the Seiko Prospex Samurai SRPL13 at $500–$1,000. On the specs that outlast any price: the Pro Trek PRW-B1000-1 uses Sapphire with Anti-Reflective Coating with Tough Solar (Rechargeable), against Hardlex Crystal and 41 Hours on the Prospex Samurai SRPL13. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 200m (20 ATM)
The Pro Trek PRW-B1000-1 is rated to 100m (10 ATM) while the Prospex Samurai SRPL13 handles 200m (20 ATM). The Prospex Samurai SRPL13 offers superior water resistance.
Our Verdict
Casio
Pro Trek PRW-B1000-1
Choose the Casio Pro Trek PRW-B1000-1 if you prioritize Tough Solar Quartz, Multi-Band 6 + Bluetooth engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Tough Solar (Solar Quartz), Radio-Controlled with Tough Solar (Rechargeable) 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 Casio Pro Trek PRW-B1000-1 and Seiko Prospex Samurai SRPL13 represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Seiko delivers Made in Japan 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.