Head-to-Head Comparison

Updated September 5, 2026

Casio Pro Trek PRG601-1 vs Seiko Prospex 62MAS Modern Re-interpretation

Casio's timepiece meets Seiko's diver

Quick Verdict

The Casio Pro Trek PRG601-1 ($250–$500) offers Tough Solar Quartz (No Battery Change) precision in the tier below the Seiko Prospex 62MAS Modern Re-interpretation ($1,000–$1,500). The Pro Trek PRG601-1 measures 51.6mm and is rated 100m (10 ATM). The Prospex 62MAS Modern Re-interpretation counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioPro Trek PRG601-1$250–$500 Check price SeikoProspex 62MAS Modern Re-interpretation$1,000–$1,500 Check price

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Casio

Pro Trek PRG601-1

$250–$500

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Seiko

Prospex 62MAS Modern Re-interpretation

$1,000–$1,500

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Specifications Compared

Feature	Casio Pro Trek PRG601-1	Seiko Prospex 62MAS Modern Re-interpretation
Price	$250–$500	$1,000–$1,500
Case Size	51.6mm	40.5mm
Movement	Tough Solar (Solar Quartz)	Automatic 6R35
Caliber Type	Tough Solar Quartz (No Battery Change)	Seiko In-House Automatic
Power Reserve	7 Months (Solar, Full Charge); 25 Months Power Save	70 Hours
Water Resistance	100m (10 ATM)	200m (20 ATM)
Crystal	Mineral Glass	Sapphire
Case Material	Bio-Based Resin / Stainless Steel	Stainless Steel with Super-Hard Coating
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 PRG601-1 features a Bio-Based Resin / Stainless Steel case at 51.6mm with Mineral Glass protection. The Seiko Prospex 62MAS Modern Re-interpretation offers Stainless Steel with Super-Hard Coating construction at 40.5mm with Sapphire. Both represent their brand's distinct design philosophy and heritage.

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Movement & Performance

Edge: Seiko

Tough Solar (Solar Quartz) vs Automatic 6R35

The Pro Trek PRG601-1 runs the Tough Solar (Solar Quartz) (Tough Solar Quartz (No Battery Change), 7 Months (Solar, Full Charge); 25 Months Power Save power reserve) at standard frequency. The Prospex 62MAS Modern Re-interpretation uses the Automatic 6R35 (Seiko In-House Automatic, 70 Hours reserve) at 21,600 vph (3 Hz). The Prospex 62MAS Modern Re-interpretation offers a longer power reserve.

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Wearability & Fit

Edge: Seiko

51.6mm vs 40.5mm — different wrist presence

At 51.6mm, the Pro Trek PRG601-1 has a bolder wrist presence compared to the Prospex 62MAS Modern Re-interpretation at 40.5mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM).

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Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio Pro Trek PRG601-1 sits at $250–$500 and the Seiko Prospex 62MAS Modern Re-interpretation at $1,000–$1,500. On the specs that outlast any price: the Pro Trek PRG601-1 uses Mineral Glass with 7 Months (Solar, Full Charge); 25 Months Power Save, against Sapphire and 70 Hours on the Prospex 62MAS Modern Re-interpretation. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Seiko

100m (10 ATM) vs 200m (20 ATM)

The Pro Trek PRG601-1 is rated to 100m (10 ATM) while the Prospex 62MAS Modern Re-interpretation handles 200m (20 ATM). The Prospex 62MAS Modern Re-interpretation offers superior water resistance.

Our Verdict

Casio

Pro Trek PRG601-1

Choose the Casio Pro Trek PRG601-1 if you prioritize Tough Solar Quartz (No Battery Change) engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $250–$500, it delivers Tough Solar (Solar Quartz) with 7 Months (Solar, Full Charge); 25 Months Power Save power reserve.

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Seiko

Prospex 62MAS Modern Re-interpretation

Choose the Seiko Prospex 62MAS Modern Re-interpretation if you value Seiko In-House Automatic technology, Made in Japan heritage, and 40.5mm proportions. At $1,000–$1,500, the Automatic 6R35 with 70 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio Pro Trek PRG601-1 and Seiko Prospex 62MAS Modern Re-interpretation represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Seiko delivers Made in Japan engineering.

Frequently Asked Questions

The Seiko Prospex 62MAS Modern Re-interpretation is the better buy if you want a mechanical movement; the Casio Pro Trek PRG601-1 is the better buy if you want solar power and quartz accuracy with no servicing. For water, the Seiko Prospex 62MAS Modern Re-interpretation is rated 200 m against 100 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Casio Pro Trek PRG601-1 sits a band lower ($250–$500 against $1,000–$1,500), 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 Casio Pro Trek PRG601-1 offers better upfront value, sitting a tier lower at $250–$500. However, the Seiko Prospex 62MAS Modern Re-interpretation may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The Pro Trek PRG601-1 at 51.6mm with 100m (10 ATM) water resistance handles everyday situations. The Prospex 62MAS Modern Re-interpretation at 40.5mm with 200m (20 ATM) is similarly capable. The Pro Trek PRG601-1 uses Mineral Glass while the Prospex 62MAS Modern Re-interpretation uses Sapphire. Sapphire resists scratches noticeably better than mineral glass.

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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.