Head-to-Head Comparison

Updated September 5, 2026

Casio Pro Trek PRG601-1 vs Junghans Form A Automatic

Casio's timepiece meets Junghans's dress watch

Quick Verdict

The Casio Pro Trek PRG601-1 ($250–$500) offers Tough Solar Quartz (No Battery Change) precision in the tier below the Junghans Form A Automatic ($1,000–$1,500). The Pro Trek PRG601-1 measures 51.6mm and is rated 100m (10 ATM). The Form A Automatic counters with Made in Germany craftsmanship and 50m (5 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioPro Trek PRG601-1$250–$500 Check price View the dossier

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Casio

Pro Trek PRG601-1

$250–$500

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Junghans

Form A Automatic

$1,000–$1,500

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Specifications Compared

Feature	Casio Pro Trek PRG601-1	Junghans Form A Automatic
Price	$250–$500	$1,000–$1,500
Case Size	51.6mm	39.3mm
Movement	Tough Solar (Solar Quartz)	Automatic J800.2 (ETA 2824-2)
Caliber Type	Tough Solar Quartz (No Battery Change)	Swiss ETA Base, German-Finished
Power Reserve	7 Months (Solar, Full Charge); 25 Months Power Save	38 Hours
Water Resistance	100m (10 ATM)	50m (5 ATM)
Crystal	Mineral Glass	Flat Sapphire with Anti-Reflective Coating
Case Material	Bio-Based Resin / Stainless Steel	Stainless Steel
Origin	Casio (Japan)	Made in Germany

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Casio's design language vs Junghans's approach

The Casio Pro Trek PRG601-1 features a Bio-Based Resin / Stainless Steel case at 51.6mm with Mineral Glass protection. The Junghans Form A Automatic offers Stainless Steel construction at 39.3mm with Flat Sapphire with Anti-Reflective Coating. Both represent their brand's distinct design philosophy and heritage.

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Movement & Performance

Edge: Junghans

Tough Solar (Solar Quartz) vs Automatic J800.2 (ETA 2824-2)

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 Form A Automatic uses the Automatic J800.2 (ETA 2824-2) (Swiss ETA Base, German-Finished, 38 Hours reserve) at 28,800 vph (4 Hz). The Form A Automatic offers a longer power reserve.

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Wearability & Fit

Edge: Junghans

51.6mm vs 39.3mm — different wrist presence

At 51.6mm, the Pro Trek PRG601-1 has a bolder wrist presence compared to the Form A Automatic at 39.3mm. Water resistance differs: 100m (10 ATM) vs 50m (5 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 Junghans Form A Automatic 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 Flat Sapphire with Anti-Reflective Coating and 38 Hours on the Form A Automatic. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Casio

100m (10 ATM) vs 50m (5 ATM)

The Pro Trek PRG601-1 is rated to 100m (10 ATM) while the Form A Automatic handles 50m (5 ATM). The Pro Trek PRG601-1 is better suited for water activities.

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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Junghans

Form A Automatic

Choose the Junghans Form A Automatic if you value Swiss ETA Base, German-Finished technology, Made in Germany heritage, and 39.3mm proportions. At $1,000–$1,500, the Automatic J800.2 (ETA 2824-2) with 38 Hours power reserve makes it a compelling choice.

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The Bottom Line

The Casio Pro Trek PRG601-1 and Junghans Form A Automatic represent two distinct approaches to fine watchmaking — the Casio bringing Casio (Japan) tradition while Junghans delivers Made in Germany engineering.

Frequently Asked Questions

The Junghans Form A Automatic 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 Casio Pro Trek PRG601-1 is rated 100 m against 50 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 Junghans Form A Automatic 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 Form A Automatic at 39.3mm with 50m (5 ATM) is similarly capable. The Pro Trek PRG601-1 uses Mineral Glass while the Form A Automatic uses Flat Sapphire with Anti-Reflective Coating. 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.