Head-to-Head Comparison

Updated September 5, 2026

Casio Pro Trek PRW3500T-7 vs Seiko Prospex 62MAS Modern Re-interpretation

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

Quick Verdict

The Casio Pro Trek PRW3500T-7 ($250–$500) offers Tough Solar Quartz, Multi-Band 6 precision in the tier below the Seiko Prospex 62MAS Modern Re-interpretation ($1,000–$1,500). The Pro Trek PRW3500T-7 measures 56.9 × 53.4 × 14.8mm and is rated 200m (20 ATM). The Prospex 62MAS Modern Re-interpretation counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional divers for their respective tiers.

CasioPro Trek PRW3500T-7$250–$500 Check price SeikoProspex 62MAS Modern Re-interpretation$1,000–$1,500 Check price

Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.

Casio

Pro Trek PRW3500T-7

$250–$500

Check Price Full Review

Seiko

Prospex 62MAS Modern Re-interpretation

$1,000–$1,500

Check Price Full Review

Specifications Compared

Feature	Casio Pro Trek PRW3500T-7	Seiko Prospex 62MAS Modern Re-interpretation
Price	$250–$500	$1,000–$1,500
Case Size	56.9 × 53.4 × 14.8mm	40.5mm
Movement	Tough Solar (Solar Quartz), Radio-Controlled	Automatic 6R35
Caliber Type	Tough Solar Quartz, Multi-Band 6	Seiko In-House Automatic
Power Reserve	Tough Solar (Rechargeable)	70 Hours
Water Resistance	200m (20 ATM)	200m (20 ATM)
Crystal	Mineral Glass	Sapphire
Case Material	Resin / Stainless Steel, Titanium Bracelet	Stainless Steel with Super-Hard Coating
Origin	Casio (Japan)	Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Seiko's approach

The Casio Pro Trek PRW3500T-7 features a Resin / Stainless Steel, Titanium Bracelet case at 56.9 × 53.4 × 14.8mm 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.

⚙️

Movement & Performance

Edge: Seiko

Tough Solar (Solar Quartz), Radio-Controlled vs Automatic 6R35

The Pro Trek PRW3500T-7 runs the Tough Solar (Solar Quartz), Radio-Controlled (Tough Solar Quartz, Multi-Band 6, Tough Solar (Rechargeable) 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.

📏

Wearability & Fit

Edge: Seiko

56.9 × 53.4 × 14.8mm vs 40.5mm — different wrist presence

At 56.9 × 53.4 × 14.8mm, the Pro Trek PRW3500T-7 has a bolder wrist presence compared to the Prospex 62MAS Modern Re-interpretation at 40.5mm. Water resistance differs: 200m (20 ATM) vs 200m (20 ATM).

💰

Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio Pro Trek PRW3500T-7 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 PRW3500T-7 uses Mineral Glass with Tough Solar (Rechargeable), against Sapphire and 70 Hours on the Prospex 62MAS Modern Re-interpretation. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Draw

200m (20 ATM) vs 200m (20 ATM)

The Pro Trek PRW3500T-7 is rated to 200m (20 ATM) while the Prospex 62MAS Modern Re-interpretation handles 200m (20 ATM). Both offer identical water resistance ratings.

Our Verdict

Casio

Pro Trek PRW3500T-7

Choose the Casio Pro Trek PRW3500T-7 if you prioritize Tough Solar Quartz, Multi-Band 6 engineering, Casio (Japan) craftsmanship, and 200m (20 ATM) water resistance. At $250–$500, it delivers Tough Solar (Solar Quartz), Radio-Controlled with Tough Solar (Rechargeable) power reserve.

Check Price on Amazon

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.

Check Price on Amazon

Try Prime Free — Free Shipping on Both Watches Students & 18–24: start Prime for Young Adults free

The Bottom Line

The Casio Pro Trek PRW3500T-7 and Seiko Prospex 62MAS Modern Re-interpretation represent two distinct approaches to the diver category — 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 PRW3500T-7 is the better buy if you want solar power and quartz accuracy with no servicing. On price, the Casio Pro Trek PRW3500T-7 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 PRW3500T-7 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 PRW3500T-7 at 56.9 × 53.4 × 14.8mm with 200m (20 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 PRW3500T-7 uses Mineral Glass while the Prospex 62MAS Modern Re-interpretation uses Sapphire. Sapphire resists scratches noticeably better than mineral glass.

More Comparisons

Oris Aquis vs Seiko SPB143 (62MAS)

Swiss independence meets Japanese precision diving

Casio Pro Trek PRG601 vs PRW3500T

Two Triple Sensor solar Pro Treks

Tag Heuer Carrera Chronograph vs Casio Pro Trek PRW3500T-7

Tag Heuer's chronograph meets Casio's diver

Explore These Watches

Casio Pro Trek PRW3500T-7 — Full Review Seiko Prospex 62MAS Modern Re-interpretation — Full Review Browse All Guides

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.