Head-to-Head Comparison

Updated September 5, 2026

Casio Pro Trek PRW-B1000-1 vs Seiko Presage Cocktail Time SRPE15

Two timepieces compared — $500–$1,000 vs $250–$500

Quick Verdict

The Seiko Presage Cocktail Time SRPE15 ($250–$500) delivers Seiko In-House Automatic technology in the tier below the Casio Pro Trek PRW-B1000-1 ($500–$1,000). The Presage Cocktail Time SRPE15 measures 40.5mm and is rated 50m (5 ATM). The Pro Trek PRW-B1000-1 justifies its premium with Casio (Japan) heritage and Tough Solar (Solar Quartz), Radio-Controlled. Both represent excellent choices in the timepiece category.

CasioPro Trek PRW-B1000-1$500–$1,000 Check price SeikoPresage Cocktail Time SRPE15$250–$500 Check price

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Casio

Pro Trek PRW-B1000-1

$500–$1,000

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Seiko

Presage Cocktail Time SRPE15

$250–$500

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Specifications Compared

Feature	Casio Pro Trek PRW-B1000-1	Seiko Presage Cocktail Time SRPE15
Price	$500–$1,000	$250–$500
Case Size	50.8 × 45.8 × 14.9mm	40.5mm
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)	50m (5 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

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Design & Aesthetics

Edge: Draw

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 Presage Cocktail Time SRPE15 offers Stainless Steel construction at 40.5mm with Hardlex Crystal. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Seiko

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 Presage Cocktail Time SRPE15 uses the Automatic Caliber 4R35 (Seiko In-House Automatic, 41 Hours reserve) at 21,600 vph (3 Hz). The Presage Cocktail Time SRPE15 offers a longer power reserve.

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Wearability & Fit

Edge: Seiko

50.8 × 45.8 × 14.9mm vs 40.5mm — different wrist presence

At 50.8 × 45.8 × 14.9mm, the Pro Trek PRW-B1000-1 has a bolder wrist presence compared to the Presage Cocktail Time SRPE15 at 40.5mm. Water resistance differs: 100m (10 ATM) vs 50m (5 ATM).

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Value & Cost of Ownership

Edge: Seiko

Seiko sits in the lower tier

The Casio Pro Trek PRW-B1000-1 sits at $500–$1,000 and the Seiko Presage Cocktail Time SRPE15 at $250–$500. 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 Presage Cocktail Time SRPE15. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Casio

100m (10 ATM) vs 50m (5 ATM)

The Pro Trek PRW-B1000-1 is rated to 100m (10 ATM) while the Presage Cocktail Time SRPE15 handles 50m (5 ATM). The Pro Trek PRW-B1000-1 is better suited for water activities.

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.

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Seiko

Presage Cocktail Time SRPE15

Choose the Seiko Presage Cocktail Time SRPE15 if you value Seiko In-House Automatic technology, Made in Japan heritage, and 40.5mm proportions. At $250–$500, the Automatic Caliber 4R35 with 41 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio Pro Trek PRW-B1000-1 and Seiko Presage Cocktail Time SRPE15 represent two distinct approaches to the timepiece category — the Casio bringing Casio (Japan) tradition while Seiko delivers Made in Japan engineering.

Frequently Asked Questions

The Seiko Presage Cocktail Time SRPE15 is the better buy if you want a mechanical movement; the Casio Pro Trek PRW-B1000-1 is the better buy if you want solar power and quartz accuracy with no servicing. For water, the Casio Pro Trek PRW-B1000-1 is rated 100 m against 50 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Seiko Presage Cocktail Time SRPE15 sits a band lower ($250–$500 against $500–$1,000), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Seiko Presage Cocktail Time SRPE15 offers better upfront value, sitting a tier lower at $250–$500. However, the Casio Pro Trek PRW-B1000-1 may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Pro Trek PRW-B1000-1 at 50.8 × 45.8 × 14.9mm with 100m (10 ATM) water resistance handles everyday situations. The Presage Cocktail Time SRPE15 at 40.5mm with 50m (5 ATM) is similarly capable. The Pro Trek PRW-B1000-1 uses Sapphire with Anti-Reflective Coating while the Presage Cocktail Time SRPE15 uses Hardlex Crystal.

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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.