Bulova Classic Automatic 98A139 vs Citizen Promaster Sea Eco-Drive Diver
Bulova's timepiece meets Citizen's diver
Quick Verdict
The Bulova Classic Automatic 98A139 ($250–$500) and Citizen Promaster Sea Eco-Drive Diver ($250–$500) are closely matched timepieces at similar price points. The Classic Automatic 98A139 emphasizes Self-Winding Automatic engineering while the Promaster Sea Eco-Drive Diver focuses on Made in Japan craftsmanship.
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Specifications Compared
| Feature | Bulova Classic Automatic 98A139 | Citizen Promaster Sea Eco-Drive Diver |
|---|---|---|
| Price | $250–$500 | $250–$500 |
| Case Size | 45mm | 44mm |
| Movement | Automatic, 21 Jewels | Eco-Drive Caliber E168 |
| Caliber Type | Self-Winding Automatic | Citizen Eco-Drive (Solar Quartz) |
| Power Reserve | — | — |
| Water Resistance | 30m (3 ATM) | 200m (20 ATM) ISO 6425 |
| Crystal | Domed Crystal | Mineral Crystal |
| Case Material | Black Ion-Plated Stainless Steel | Stainless Steel |
| Origin | Japanese Movement | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Bulova's design language vs Citizen's approach
The Bulova Classic Automatic 98A139 features a Black Ion-Plated Stainless Steel case at 45mm with Domed Crystal protection. The Citizen Promaster Sea Eco-Drive Diver offers Stainless Steel construction at 44mm with Mineral Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, 21 Jewels vs Eco-Drive Caliber E168
The Classic Automatic 98A139 runs the Automatic, 21 Jewels (Self-Winding Automatic, standard power reserve) at standard frequency. The Promaster Sea Eco-Drive Diver uses the Eco-Drive Caliber E168 (Citizen Eco-Drive (Solar Quartz), standard reserve) at standard. Power reserves are closely matched.
Wearability & Fit
45mm vs 44mm — different wrist presence
At 45mm, the Classic Automatic 98A139 has a bolder wrist presence compared to the Promaster Sea Eco-Drive Diver at 44mm. Water resistance differs: 30m (3 ATM) vs 200m (20 ATM) ISO 6425.
Value & Cost of Ownership
Same tier — different value propositions
The Bulova Classic Automatic 98A139 sits at $250–$500 and the Citizen Promaster Sea Eco-Drive Diver at $250–$500. On the specs that outlast any price: the Classic Automatic 98A139 uses Domed Crystal with a standard reserve, against Mineral Crystal and a standard reserve on the Promaster Sea Eco-Drive Diver. Service intervals are typically 5-7 years for both.
Water Resistance
30m (3 ATM) vs 200m (20 ATM) ISO 6425
The Classic Automatic 98A139 is rated to 30m (3 ATM) while the Promaster Sea Eco-Drive Diver handles 200m (20 ATM) ISO 6425. The Promaster Sea Eco-Drive Diver 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 AmazonCitizen
Promaster Sea Eco-Drive Diver
Choose the Citizen Promaster Sea Eco-Drive Diver if you value Citizen Eco-Drive (Solar Quartz) technology, Made in Japan heritage, and 44mm proportions. At $250–$500, the Eco-Drive Caliber E168 with ample power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Bulova Classic Automatic 98A139 and Citizen Promaster Sea Eco-Drive Diver represent two distinct approaches to fine watchmaking — the Bulova bringing Japanese Movement tradition while Citizen delivers Made in Japan engineering.
Frequently Asked Questions
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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.