Head-to-Head Comparison

Casio MTP-S120L Solar Field vs Seiko Prospex 62MAS Modern Re-interpretation

Casio's field watch meets Seiko's diver

Quick Verdict

The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision at $900 less than the Seiko Prospex 62MAS Modern Re-interpretation ($1,000–$1,500). 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 price points.

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

Casio MTP-S120L Solar Field

Casio

MTP-S120L Solar Field

$100–$150

Seiko Prospex 62MAS Modern Re-interpretation

Seiko

Prospex 62MAS Modern Re-interpretation

$1,000–$1,500

Specifications Compared

FeatureCasio MTP-S120L Solar FieldSeiko Prospex 62MAS Modern Re-interpretation
Price$100–$150$1,000–$1,500
Case Size44.5mm40.5mm
MovementSolar-Powered QuartzAutomatic 6R35
Caliber TypeCasio Tough Solar QuartzSeiko In-House Automatic
Power ReserveMonths on a full solar charge; no battery replacement70 Hours
Water Resistance100m (10 ATM)200m (20 ATM)
CrystalMineral CrystalSapphire
Case MaterialStainless SteelStainless Steel with Super-Hard Coating
OriginCasio (Japan)Made in Japan

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Seiko's approach

⚙️

Movement & Performance

Edge: Seiko

Solar-Powered Quartz vs Automatic 6R35

📏

Wearability & Fit

Edge: Seiko

44.5mm vs 40.5mm — different wrist presence

💰

Value & Cost of Ownership

Edge: Casio

Casio is $900 more affordable

💧

Water Resistance

Edge: Seiko

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

Our Verdict

Casio

MTP-S120L Solar Field

Choose the Casio MTP-S120L Solar Field if you prioritize Casio Tough Solar Quartz engineering, Casio (Japan) craftsmanship, and 100m (10 ATM) water resistance. At $100–$150, it delivers Solar-Powered Quartz with Months on a full solar charge; no battery replacement 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

The Bottom Line

The Casio MTP-S120L Solar Field 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