Head-to-Head Comparison

Updated September 5, 2026

Casio MTP-S120L Solar Field vs Raymond Weil Freelancer Open Heart

Casio's field watch meets Raymond Weil's timepiece

Quick Verdict

The Casio MTP-S120L Solar Field ($100–$150) offers Casio Tough Solar Quartz precision in the tier below the Raymond Weil Freelancer Open Heart ($1,500–$2,500). The MTP-S120L Solar Field measures 42mm (49 x 42 x 10.9mm) and is rated 100m (10 ATM). The Freelancer Open Heart counters with Swiss Made craftsmanship and 100m (10 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioMTP-S120L Solar Field$100–$150 Check price Raymond WeilFreelancer Open Heart$1,500–$2,500 Check price

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Casio

MTP-S120L Solar Field

$100–$150

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Raymond Weil

Freelancer Open Heart

$1,500–$2,500

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Specifications Compared

Feature	Casio MTP-S120L Solar Field	Raymond Weil Freelancer Open Heart
Price	$100–$150	$1,500–$2,500
Case Size	42mm (49 x 42 x 10.9mm)	42mm
Movement	Solar-Powered Quartz	Automatic Caliber RW4200
Caliber Type	Casio Tough Solar Quartz	Automatic (Sellita SW200 base)
Power Reserve	Months on a full solar charge; no battery replacement	38 Hours
Water Resistance	100m (10 ATM)	100m (10 ATM)
Crystal	Mineral Crystal	Sapphire with Antiglare
Case Material	Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Swiss Made

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Raymond Weil's approach

The Casio MTP-S120L Solar Field features a Stainless Steel case at 42mm (49 x 42 x 10.9mm) with Mineral Crystal protection. The Raymond Weil Freelancer Open Heart offers Stainless Steel construction at 42mm with Sapphire with Antiglare. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Raymond Weil

Solar-Powered Quartz vs Automatic Caliber RW4200

The MTP-S120L Solar Field runs the Solar-Powered Quartz (Casio Tough Solar Quartz, Months on a full solar charge; no battery replacement power reserve) at standard frequency. The Freelancer Open Heart uses the Automatic Caliber RW4200 (Automatic (Sellita SW200 base), 38 Hours reserve) at 28,800 vph (4 Hz). The Freelancer Open Heart offers a longer power reserve.

📏

Wearability & Fit

Edge: Draw

42mm (49 x 42 x 10.9mm) vs 42mm — different wrist presence

At 42mm (49 x 42 x 10.9mm), the MTP-S120L Solar Field is similarly sized compared to the Freelancer Open Heart at 42mm. Water resistance differs: 100m (10 ATM) vs 100m (10 ATM).

💰

Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio MTP-S120L Solar Field sits at $100–$150 and the Raymond Weil Freelancer Open Heart at $1,500–$2,500. On the specs that outlast any price: the MTP-S120L Solar Field uses Mineral Crystal with Months on a full solar charge; no battery replacement, against Sapphire with Antiglare and 38 Hours on the Freelancer Open Heart. Service intervals are typically 5-7 years for both.

💧

Water Resistance

Edge: Draw

100m (10 ATM) vs 100m (10 ATM)

The MTP-S120L Solar Field is rated to 100m (10 ATM) while the Freelancer Open Heart handles 100m (10 ATM). Both offer identical water resistance ratings.

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.

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Raymond Weil

Freelancer Open Heart

Choose the Raymond Weil Freelancer Open Heart if you value Automatic (Sellita SW200 base) technology, Swiss Made heritage, and 42mm proportions. At $1,500–$2,500, the Automatic Caliber RW4200 with 38 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio MTP-S120L Solar Field and Raymond Weil Freelancer Open Heart represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Raymond Weil delivers Swiss Made engineering.

Frequently Asked Questions

The Raymond Weil Freelancer Open Heart is the better buy if you want a mechanical movement; the Casio MTP-S120L Solar Field is the better buy if you want solar power and quartz accuracy with no servicing. On price, the Casio MTP-S120L Solar Field sits a band lower ($100–$150 against $1,500–$2,500), 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 MTP-S120L Solar Field offers better upfront value, sitting a tier lower at $100–$150. However, the Raymond Weil Freelancer Open Heart may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The MTP-S120L Solar Field at 42mm (49 x 42 x 10.9mm) with 100m (10 ATM) water resistance handles everyday situations. The Freelancer Open Heart at 42mm with 100m (10 ATM) is similarly capable. The MTP-S120L Solar Field uses Mineral Crystal while the Freelancer Open Heart uses Sapphire with Antiglare. 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.