Head-to-Head Comparison

Updated September 5, 2026

Casio F-91W vs Junghans Form A Automatic

Casio's timepiece meets Junghans's dress watch

Quick Verdict

The Casio F-91W (Under $50) offers Casio Digital Quartz (Battery) precision in the tier below the Junghans Form A Automatic ($1,000–$1,500). The F-91W measures 35mm and is rated 30m (Splash Resistant). The Form A Automatic counters with Made in Germany craftsmanship and 50m (5 ATM) water resistance. Both are exceptional watches for their respective tiers.

CasioF-91WUnder $50 Check price View the dossier

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Casio

F-91W

Under $50

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Junghans

Form A Automatic

$1,000–$1,500

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Specifications Compared

Feature	Casio F-91W	Junghans Form A Automatic
Price	Under $50	$1,000–$1,500
Case Size	35mm	39.3mm
Movement	Quartz Module 593	Automatic J800.2 (ETA 2824-2)
Caliber Type	Casio Digital Quartz (Battery)	Swiss ETA Base, German-Finished
Power Reserve	7-Year Battery	38 Hours
Water Resistance	30m (Splash Resistant)	50m (5 ATM)
Crystal	Acrylic	Flat Sapphire with Anti-Reflective Coating
Case Material	Resin	Stainless Steel
Origin	Casio (Japan)	Made in Germany

Category-by-Category Analysis

🎨

Design & Aesthetics

Edge: Draw

Casio's design language vs Junghans's approach

The Casio F-91W features a Resin case at 35mm with Acrylic 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.

⚙️

Movement & Performance

Edge: Junghans

Quartz Module 593 vs Automatic J800.2 (ETA 2824-2)

The F-91W runs the Quartz Module 593 (Casio Digital Quartz (Battery), 7-Year Battery 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.

📏

Wearability & Fit

Edge: Casio

35mm vs 39.3mm — different wrist presence

At 35mm, the F-91W wears more compactly on smaller wrists compared to the Form A Automatic at 39.3mm. Water resistance differs: 30m (Splash Resistant) vs 50m (5 ATM).

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Value & Cost of Ownership

Edge: Casio

Casio sits in the lower tier

The Casio F-91W sits at Under $50 and the Junghans Form A Automatic at $1,000–$1,500. On the specs that outlast any price: the F-91W uses Acrylic with 7-Year Battery, 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: Junghans

30m (Splash Resistant) vs 50m (5 ATM)

The F-91W is rated to 30m (Splash Resistant) while the Form A Automatic handles 50m (5 ATM). The Form A Automatic offers superior water resistance.

Our Verdict

Casio

F-91W

Choose the Casio F-91W if you prioritize Casio Digital Quartz (Battery) engineering, Casio (Japan) craftsmanship, and 30m (Splash Resistant) water resistance. At Under $50, it delivers Quartz Module 593 with 7-Year Battery 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 F-91W 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 F-91W is the better buy if you want quartz accuracy with no servicing. On price, the Casio F-91W sits a band lower (Under $50 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 F-91W offers better upfront value, sitting a tier lower at Under $50. However, the Junghans Form A Automatic may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The F-91W at 35mm with 30m (Splash Resistant) water resistance handles everyday situations. The Form A Automatic at 39.3mm with 50m (5 ATM) is similarly capable. The F-91W uses Acrylic while the Form A Automatic uses Flat Sapphire with Anti-Reflective Coating. Sapphire resists scratches noticeably better than acrylic.

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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.