Head-to-Head Comparison

Updated September 5, 2026

Casio MTP-S120L Solar Field vs Invicta Pro Diver Automatic

Casio's field watch meets Invicta's diver

Quick Verdict

The Invicta Pro Diver Automatic ($50–$100) delivers Seiko NH35 Automatic (Hacking, Hand-Winding) technology in the tier below the Casio MTP-S120L Solar Field ($100–$150). The Pro Diver Automatic measures 40mm and is rated 200m (20 ATM). The MTP-S120L Solar Field justifies its premium with Casio (Japan) heritage and Solar-Powered Quartz. Both represent excellent choices in the luxury watch category.

CasioMTP-S120L Solar Field$100–$150 Check price InvictaPro Diver Automatic$50–$100 Check price

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Casio

MTP-S120L Solar Field

$100–$150

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Invicta

Pro Diver Automatic

$50–$100

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Specifications Compared

Feature	Casio MTP-S120L Solar Field	Invicta Pro Diver Automatic
Price	$100–$150	$50–$100
Case Size	42mm (49 x 42 x 10.9mm)	40mm
Movement	Solar-Powered Quartz	Automatic Seiko NH35
Caliber Type	Casio Tough Solar Quartz	Seiko NH35 Automatic (Hacking, Hand-Winding)
Power Reserve	Months on a full solar charge; no battery replacement	41 Hours
Water Resistance	100m (10 ATM)	200m (20 ATM)
Crystal	Mineral Crystal	Mineral Glass
Case Material	Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Japanese Movement (Seiko NH35)

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Casio's design language vs Invicta'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 Invicta Pro Diver Automatic offers Stainless Steel construction at 40mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.

⚙️

Movement & Performance

Edge: Invicta

Solar-Powered Quartz vs Automatic Seiko NH35

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 Pro Diver Automatic uses the Automatic Seiko NH35 (Seiko NH35 Automatic (Hacking, Hand-Winding), 41 Hours reserve) at 21,600 vph (3 Hz). The Pro Diver Automatic offers a longer power reserve.

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Wearability & Fit

Edge: Invicta

42mm (49 x 42 x 10.9mm) vs 40mm — different wrist presence

At 42mm (49 x 42 x 10.9mm), the MTP-S120L Solar Field has a bolder wrist presence compared to the Pro Diver Automatic at 40mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM).

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Value & Cost of Ownership

Edge: Invicta

Invicta sits in the lower tier

The Casio MTP-S120L Solar Field sits at $100–$150 and the Invicta Pro Diver Automatic at $50–$100. 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 Mineral Glass and 41 Hours on the Pro Diver Automatic. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Invicta

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

The MTP-S120L Solar Field is rated to 100m (10 ATM) while the Pro Diver Automatic handles 200m (20 ATM). The Pro Diver Automatic offers superior water resistance.

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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Invicta

Pro Diver Automatic

Choose the Invicta Pro Diver Automatic if you value Seiko NH35 Automatic (Hacking, Hand-Winding) technology, Japanese Movement (Seiko NH35) heritage, and 40mm proportions. At $50–$100, the Automatic Seiko NH35 with 41 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio MTP-S120L Solar Field and Invicta Pro Diver Automatic represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Invicta delivers Japanese Movement (Seiko NH35) engineering.

Frequently Asked Questions

The Invicta Pro Diver Automatic 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. For water, the Invicta Pro Diver Automatic 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 Invicta Pro Diver Automatic sits a band lower ($50–$100 against $100–$150), 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 Invicta Pro Diver Automatic offers better upfront value, sitting a tier lower at $50–$100. However, the Casio MTP-S120L Solar Field 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 Pro Diver Automatic at 40mm with 200m (20 ATM) is similarly capable. The MTP-S120L Solar Field uses Mineral Crystal while the Pro Diver Automatic uses 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.