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Bulova Classic Automatic 98A139 vs Casio Pro Trek PRG601-1
Two timepieces compared — $250–$500 vs $250–$500
Quick Verdict
The Bulova Classic Automatic 98A139 ($250–$500) and Casio Pro Trek PRG601-1 ($250–$500) are closely matched timepieces at similar price points. The Classic Automatic 98A139 emphasizes Self-Winding Automatic engineering while the Pro Trek PRG601-1 focuses on Casio (Japan) craftsmanship.
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Specifications Compared
| Feature | Bulova Classic Automatic 98A139 | Casio Pro Trek PRG601-1 |
|---|---|---|
| Price | $250–$500 | $250–$500 |
| Case Size | 45mm | 51.6mm |
| Movement | Automatic, 21 Jewels | Tough Solar (Solar Quartz) |
| Caliber Type | Self-Winding Automatic | Tough Solar Quartz (No Battery Change) |
| Power Reserve | — | 7 Months (Solar, Full Charge); 25 Months Power Save |
| Water Resistance | 30m (3 ATM) | 100m (10 ATM) |
| Crystal | Domed Crystal | Mineral Glass |
| Case Material | Black Ion-Plated Stainless Steel | Bio-Based Resin / Stainless Steel |
| Origin | Japanese Movement | Casio (Japan) |
Category-by-Category Analysis
Design & Aesthetics
Bulova's design language vs Casio's approach
The Bulova Classic Automatic 98A139 features a Black Ion-Plated Stainless Steel case at 45mm with Domed Crystal protection. The Casio Pro Trek PRG601-1 offers Bio-Based Resin / Stainless Steel construction at 51.6mm with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, 21 Jewels vs Tough Solar (Solar Quartz)
The Classic Automatic 98A139 runs the Automatic, 21 Jewels (Self-Winding Automatic, standard power reserve) at standard frequency. The Pro Trek PRG601-1 uses the Tough Solar (Solar Quartz) (Tough Solar Quartz (No Battery Change), 7 Months (Solar, Full Charge); 25 Months Power Save reserve) at standard. The Pro Trek PRG601-1 offers a longer power reserve.
Wearability & Fit
45mm vs 51.6mm — different wrist presence
At 45mm, the Classic Automatic 98A139 wears more compactly on smaller wrists compared to the Pro Trek PRG601-1 at 51.6mm. Water resistance differs: 30m (3 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Bulova Classic Automatic 98A139 sits at $250–$500 and the Casio Pro Trek PRG601-1 at $250–$500. On the specs that outlast any price: the Classic Automatic 98A139 uses Domed Crystal with a standard reserve, against Mineral Glass and 7 Months (Solar, Full Charge); 25 Months Power Save on the Pro Trek PRG601-1. Service intervals are typically 5-7 years for both.
Water Resistance
30m (3 ATM) vs 100m (10 ATM)
The Classic Automatic 98A139 is rated to 30m (3 ATM) while the Pro Trek PRG601-1 handles 100m (10 ATM). The Pro Trek PRG601-1 offers superior water resistance.
Our Verdict
Bulova
Classic Automatic 98A139
Choose the Bulova Classic Automatic 98A139 if you prioritize Self-Winding Automatic engineering, Japanese Movement craftsmanship, and 30m (3 ATM) water resistance. At $250–$500, it delivers Automatic, 21 Jewels with solid power reserve.
Check Price on AmazonCasio
Pro Trek PRG601-1
Choose the Casio Pro Trek PRG601-1 if you value Tough Solar Quartz (No Battery Change) technology, Casio (Japan) heritage, and 51.6mm proportions. At $250–$500, the Tough Solar (Solar Quartz) with 7 Months (Solar, Full Charge); 25 Months Power Save power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Bulova Classic Automatic 98A139 and Casio Pro Trek PRG601-1 represent two distinct approaches to the timepiece category — the Bulova bringing Japanese Movement tradition while Casio delivers Casio (Japan) engineering.
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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.